142 lines
6.0 KiB
JSON
142 lines
6.0 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-2026-55850",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-06-17T16:44:40.994Z",
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"datePublished": "2026-08-21T18:30:12.251Z",
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"dateUpdated": "2026-08-21T19:54:55.604Z"
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},
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"containers": {
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"cna": {
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"title": "Element Web: A malicious homeserver can inject HTML in Element Web using its homepage",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-79",
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"lang": "en",
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"description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
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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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"metrics": [
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{
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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"attackRequirements": "NONE",
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"privilegesRequired": "NONE",
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"userInteraction": "PASSIVE",
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"vulnConfidentialityImpact": "LOW",
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"vulnIntegrityImpact": "LOW",
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"vulnAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"baseScore": 5.3,
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
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"version": "4.0"
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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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"name": "https://github.com/element-hq/element-web/security/advisories/GHSA-wrcp-5v3v-3j6v",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/element-hq/element-web/security/advisories/GHSA-wrcp-5v3v-3j6v"
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},
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{
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"name": "https://github.com/element-hq/element-web/commit/7949980a7e3c7e397d7afe899ef1b0563c417b0e",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/element-hq/element-web/commit/7949980a7e3c7e397d7afe899ef1b0563c417b0e"
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},
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{
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"name": "https://github.com/element-hq/element-web/releases/tag/v1.12.22",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/element-hq/element-web/releases/tag/v1.12.22"
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},
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{
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"name": "https://www.machinespirits.com/advisory/563a17",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://www.machinespirits.com/advisory/563a17"
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}
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],
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"affected": [
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{
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"vendor": "element-hq",
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"product": "element-web",
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"versions": [
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{
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"version": "< 1.12.22",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-08-21T18:30:12.251Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Element Web is a Matrix web client built using the Matrix React SDK. Prior to 1.12.22, EmbeddedPage in apps/web/src/components/structures/EmbeddedPage.tsx renders homeserver-supplied homepage content through dangerouslySetInnerHTML without passing it through sanitizedHtmlNode. A malicious homeserver can provide crafted HTML that Element Web renders on the homepage; the content security policy prevents JavaScript but not phishing HTML. This issue is fixed in version 1.12.22."
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}
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],
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"source": {
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"advisory": "GHSA-wrcp-5v3v-3j6v",
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"discovery": "UNKNOWN"
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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": "2026-08-21T19:54:43.766385Z",
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"id": "CVE-2026-55850",
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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": "2026-08-21T19:54:55.604Z"
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}
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}
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]
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}
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} |