150 lines
6.9 KiB
JSON
150 lines
6.9 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-2026-93633",
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"assignerOrgId": "9974b330-7714-4307-a722-5648477acda7",
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"state": "PUBLISHED",
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"assignerShortName": "rapid7",
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"dateReserved": "2026-09-18T12:22:34.911Z",
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"datePublished": "2026-10-23T13:25:21.365Z",
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"dateUpdated": "2026-10-28T19:51:07.972Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "9974b330-7714-4307-a722-5648477acda7",
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"shortName": "rapid7",
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"dateUpdated": "2026-10-23T13:25:21.365Z"
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},
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"title": "Zimbra Collaboration Suite Briefcase CSS Sanitization Bypass via Non-ASCII Stylesheet Characters",
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"datePublic": "2026-10-23T12:54:00.000Z",
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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-79",
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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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"affected": [
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{
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"vendor": "Zimbra",
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"product": "Zimbra Collaboration Suite",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"lessThanOrEqual": "10.1.20",
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"versionType": "semver"
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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": "A CSS sanitization vulnerability in Zimbra Collaboration Suite (ZCS) allows an authenticated user with Briefcase access to publish a document that displays attacker-controlled content under the Zimbra origin. When processing a stylesheet containing non-ASCII characters, DefangFilter appends the final ASCII segment without sanitizing it. HTML stored as application/x-zimbra-doc can therefore retain CSS URL references that the normal sanitizer removes. An attacker can share a crafted document that loads external resources and displays a credential-collection form using Zimbra's own visual assets. Exploitation requires the victim to open the document in a browser that renders the content type inline; credential theft additionally requires form submission. ZCS 10.1.16 and 10.1.20 are affected.",
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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": "A CSS sanitization vulnerability in Zimbra Collaboration Suite (ZCS) allows an authenticated user with Briefcase access to publish a document that displays attacker-controlled content under the Zimbra origin. When processing a stylesheet containing non-ASCII characters, DefangFilter appends the final ASCII segment without sanitizing it. HTML stored as application/x-zimbra-doc can therefore retain CSS URL references that the normal sanitizer removes. An attacker can share a crafted document that loads external resources and displays a credential-collection form using Zimbra's own visual assets. Exploitation requires the victim to open the document in a browser that renders the content type inline; credential theft additionally requires form submission. ZCS 10.1.16 and 10.1.20 are affected."
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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://wiki.zimbra.com/wiki/Zimbra_Security_Advisories",
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"tags": [
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"vendor-advisory"
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]
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},
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{
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"url": "https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1/",
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"tags": [
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"related"
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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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"cvssV3_1": {
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"version": "3.1",
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"privilegesRequired": "LOW",
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"userInteraction": "REQUIRED",
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"scope": "CHANGED",
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"confidentialityImpact": "LOW",
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"integrityImpact": "LOW",
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"availabilityImpact": "NONE",
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"baseSeverity": "MEDIUM",
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"baseScore": 5.4,
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A: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": "Jonah Burgess (CryptoCat), Senior Security Researcher, Rapid7",
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"type": "finder"
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}
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],
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"source": {
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"discovery": "UNKNOWN"
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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": "2026-10-28T17:48:57.736632Z",
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"id": "CVE-2026-93633",
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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": "2026-10-28T19:51:07.972Z"
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}
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}
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]
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}
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} |