179 lines
8.1 KiB
JSON
179 lines
8.1 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-18426",
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"assignerOrgId": "ff5b8ace-8b95-4078-9743-eac1ca5451de",
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"state": "PUBLISHED",
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"assignerShortName": "ConcreteCMS",
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"dateReserved": "2026-07-30T18:17:00.757Z",
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"datePublished": "2026-09-15T20:16:12.191Z",
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"dateUpdated": "2026-09-16T17:51:16.894Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "ff5b8ace-8b95-4078-9743-eac1ca5451de",
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"shortName": "ConcreteCMS",
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"dateUpdated": "2026-09-15T20:16:12.191Z"
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},
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"title": "Concrete CMS 9.0.0 to 9.5.2 Express Form block missing authorization allows an authenticated editor to modify Express Forms they cannot edit",
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-862",
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"description": "CWE-862 Missing Authorization",
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"type": "CWE"
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}
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]
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-1",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"
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}
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]
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},
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{
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"capecId": "CAPEC-122",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-122 Privilege Abuse"
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}
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]
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}
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],
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"affected": [
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{
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"vendor": "Concrete CMS",
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"product": "Concrete CMS",
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"collectionURL": "https://github.com/concretecms/concretecms",
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"repo": "https://github.com/concretecms/concretecms",
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"versions": [
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{
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"status": "affected",
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"version": "9.0.0",
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"lessThanOrEqual": "9.5.2",
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"versionType": "git"
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}
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],
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"defaultStatus": "unaffected"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "Concrete CMS 9.0.0 through 9.5.2 did not enforce a block-level edit-permission check on the Express Form block's control-management actions, which relied solely on CSRF token validation. Because the token is bound to the user and action rather than to a specific block, page, or form, an authenticated user with edit access to one Express Form could reuse a validly obtained token to add, modify, or delete controls on Express Forms they were not authorized to edit, including injecting a control whose value is later rendered as HTML to achieve stored XSS. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.0 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N. Thanks Yat Wu for reporting.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "<p><span>Concrete CMS 9.0.0 through 9.5.2 did not enforce a block-level edit-permission check on the Express Form block's control-management actions, which relied solely on CSRF token validation. Because the token is bound to the user and action rather than to a specific block, page, or form, an authenticated user with edit access to one Express Form could reuse a validly obtained token to add, modify, or delete controls on Express Forms they were not authorized to edit, including injecting a control whose value is later rendered as HTML to achieve stored XSS.</span> The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.0 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N. Thanks Yat Wu for reporting.</p>"
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}
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]
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}
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],
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"references": [
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{
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"url": "https://documentation.concretecms.org/developers/introduction/version-history/953-release-notes",
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"tags": [
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"release-notes"
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]
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}
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],
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"metrics": [
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "HIGH",
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"attackRequirements": "PRESENT",
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"privilegesRequired": "HIGH",
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"userInteraction": "PASSIVE",
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"vulnConfidentialityImpact": "LOW",
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"subConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"vulnAvailabilityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"exploitMaturity": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"valueDensity": "NOT_DEFINED",
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"vulnerabilityResponseEffort": "NOT_DEFINED",
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"providerUrgency": "NOT_DEFINED",
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"version": "4.0",
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"baseSeverity": "LOW",
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"baseScore": 2,
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"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
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}
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "yyyat",
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"type": "finder"
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}
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],
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"source": {
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"defect": [
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"HackerOne"
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],
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"advisory": "3798926",
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"discovery": "EXTERNAL"
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},
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"x_generator": {
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"engine": "Vulnogram 1.0.5"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-09-16T17:50:40.687608Z",
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"id": "CVE-2026-18426",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-09-16T17:51:16.894Z"
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}
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}
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]
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}
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} |