{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-25133", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-01-29T14:03:42.540Z", "datePublished": "2026-04-14T20:47:49.474Z", "dateUpdated": "2026-04-16T13:47:42.800Z"}, "containers": {"cna": {"title": "October CMS has Stored XSS via SVG Filter Bypass", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/octobercms/october/security/advisories/GHSA-gcqv-f29m-67gr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/octobercms/october/security/advisories/GHSA-gcqv-f29m-67gr"}], "affected": [{"vendor": "octobercms", "product": "october", "versions": [{"version": "< 3.7.14", "status": "affected"}, {"version": ">= 4.0.0, < 4.1.10", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-14T20:47:49.474Z"}, "descriptions": [{"lang": "en", "value": "October is a Content Management System (CMS) and web platform. Versions prior to 3.7.14 and 4.1.10 contain a stored cross-site scripting (XSS) vulnerability in the SVG sanitization logic. The regex pattern used to strip event handler attributes (such as onclick or onload) could be bypassed using a crafted payload that exploits how the pattern matches attribute boundaries, allowing malicious SVG files to be uploaded through the Media Manager with embedded JavaScript. Exploitation could lead to privilege escalation if a superuser views or embeds the malicious SVG, and requires authenticated backend access with media upload permissions. The SVG must be viewed or embedded in a page for the payload to trigger. This issue has been fixed in versions 3.7.14 and 4.1.10."}], "source": {"advisory": "GHSA-gcqv-f29m-67gr", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-16T13:47:21.893252Z", "id": "CVE-2026-25133", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-16T13:47:42.800Z"}}]}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.7.14)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.1.10)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "october", "source": "cna", "vendor": "octobercms"}, "product": "october", "vendor": "octobercms"}], "analysis": {"en": {"generated_at": "2026-04-14T22:25:42.021830+00:00", "value": {"mitigation_remediation": ["Upgrade October CMS to version 3.7.14 or 4.1.10 to apply the vendor patch that fixes the SVG sanitization loopback.", "If an upgrade cannot be performed immediately, restrict media upload permissions to trusted users only and consider disabling SVG uploads in the CMS settings.", "Re\u2011review the media library and remove any SVG files containing event handler attributes that may have been uploaded prior to the patch."], "summary": {"action": "Patch", "impact": "Stored Cross\u2011Site Scripting via Unauthorized SVG Upload"}, "threat_synthesis": {"affected_systems": "October CMS versions older than 3.7.14 and 4.1.10 are affected. The vulnerability exists in the core SVG sanitization logic and is present in the October CMS product only.", "description_and_impact": "October CMS stores user\u2011provided SVG files after sanitization. A regular expression used to strip event handler attributes can be tricked with a specially crafted payload that exploits attribute boundary detection. When a malicious SVG file containing JavaScript is uploaded through the Media Manager, the script runs whenever the file is viewed or embedded, allowing an attacker with backend upload permissions to execute arbitrary code in a superuser context, effectively achieving privilege escalation.", "risk_and_exploitability": "The CVSS score of 4.8 indicates moderate risk. No EPSS score is available, and the vulnerability is not listed in the CISA KEV catalog. Exploitation requires a user to be authenticated with media upload rights and to trigger the SVG in a browser. Because the payload is stored and only activates upon viewing, the attack vector is authenticated file upload combined with user interaction with the compromised media."}}}}, "created": "2026-04-15T14:28:40.998564+00:00", "updated": "2026-04-15T14:41:09.769685+00:00", "vendors": ["octobercms", "octobercms$PRODUCT$october"]}