{"id":"CVE-2026-112958","title":"ApostropheCMS: Stored XSS via Unescaped Widget Style Attribute Serialization","summary":"ApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, a project-defined free-form widget style field can carry an editor-controlled quote into an inline style attribute because the wrapper serializer does no…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","cvssSource":"cna","cwe":["CWE-79"],"vendor":"apostrophecms","product":"apostrophe","affected":["apostrophe < 4.34.0"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-20T16:58:10.168593Z"},"exploitAvailable":true,"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T16:59:06.566Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112958","references":[{"url":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-7jg5-frgc-c67w","label":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-7jg5-frgc-c67w"},{"url":"https://github.com/apostrophecms/apostrophe/commit/06e4b377f3c360f9e89c32dccd7e505ad5ddf498","label":"https://github.com/apostrophecms/apostrophe/commit/06e4b377f3c360f9e89c32dccd7e505ad5ddf498"},{"url":"https://github.com/apostrophecms/apostrophe/commit/40b989b1a9dd23d30029b8ce7668634265cfe5ea","label":"https://github.com/apostrophecms/apostrophe/commit/40b989b1a9dd23d30029b8ce7668634265cfe5ea"},{"url":"https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.34.0","label":"https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.34.0"}],"tags":["cve.org","exploit-available"],"ingestedAt":"2026-10-20T17:12:53.595Z","slug":"CVE-2026-112958","body":"## Overview\n\nApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, a project-defined free-form widget style field can carry an editor-controlled quote into an inline style attribute because the wrapper serializer does not apply HTML-attribute encoding. The quote can terminate the style attribute and inject executable attributes when published content, or an affected draft viewed by a higher-privileged user, is rendered. This issue is fixed in version 4.34.0.\n\n## Affected\n\n- `apostrophe < 4.34.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}