{"id":"CVE-2026-54506","state":"PUBLISHED","title":"Vvveb: Stored XSS via sanitizeHTML() bypass in user profile bio field","description":"Vvveb is a powerful and easy to use CMS with page builder to build websites, blogs or ecommerce stores. Prior to 1.0.8.5, app/controller/user/profile.php accepts the user[bio] field and passes stored content through sanitizeHTML() in system/functions.php, whose on* event-handler regular expression omits the forward-slash delimiter and whose do-while condition compares the string to itself, so forbidden nested tags are removed only once. An Author-role or higher user can submit solidus-prefixed event-handler markup or nested forbidden tags that survive sanitization. The stored bio is rendered without sufficient output encoding on /author/{username}, in the admin user-management view, and potentially in comment displays, causing attacker-controlled JavaScript to execute when unauthenticated visitors, administrators, or other users view the content. This can expose browser-session data and permit victim-context account actions, defacement, or phishing. This issue is fixed in version 1.0.8.5.","publishedAt":"2026-09-17T21:47:20.530Z","updatedAt":"2026-09-23T19:09:21.053Z","severity":{"score":7.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["givanz Vvveb"],"affected":[{"vendor":"givanz","product":"Vvveb","versions":[{"version":"< 1.0.8.5","status":"affected"}]}],"references":["https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr","https://github.com/givanz/Vvveb/commit/20a01ef08559ffdc97205edeecde86c8ea27e567","https://github.com/givanz/Vvveb/releases/tag/1.0.8.5"],"weaknesses":["CWE-79","CWE-116","CWE-185"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54506.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54506","state":"PUBLISHED","datePublished":"2026-09-17T21:47:20.530Z","dateUpdated":"2026-09-23T19:09:21.053Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-15T18:01:15.512Z"},"containers":{"cna":{"title":"Vvveb: Stored XSS via sanitizeHTML() bypass in user profile bio field","descriptions":[{"lang":"en","value":"Vvveb is a powerful and easy to use CMS with page builder to build websites, blogs or ecommerce stores. Prior to 1.0.8.5, app/controller/user/profile.php accepts the user[bio] field and passes stored content through sanitizeHTML() in system/functions.php, whose on* event-handler regular expression omits the forward-slash delimiter and whose do-while condition compares the string to itself, so forbidden nested tags are removed only once. An Author-role or higher user can submit solidus-prefixed event-handler markup or nested forbidden tags that survive sanitization. The stored bio is rendered without sufficient output encoding on /author/{username}, in the admin user-management view, and potentially in comment displays, causing attacker-controlled JavaScript to execute when unauthenticated visitors, administrators, or other users view the content. This can expose browser-session data and permit victim-context account actions, defacement, or phishing. This issue is fixed in version 1.0.8.5."}],"affected":[{"vendor":"givanz","product":"Vvveb","versions":[{"version":"< 1.0.8.5","status":"affected"}]}],"references":[{"url":"https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr","name":"https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/givanz/Vvveb/commit/20a01ef08559ffdc97205edeecde86c8ea27e567","name":"https://github.com/givanz/Vvveb/commit/20a01ef08559ffdc97205edeecde86c8ea27e567","tags":["x_refsource_MISC"]},{"url":"https://github.com/givanz/Vvveb/releases/tag/1.0.8.5","name":"https://github.com/givanz/Vvveb/releases/tag/1.0.8.5","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.6,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-116","lang":"en","description":"CWE-116: Improper Encoding or Escaping of Output","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-185","lang":"en","description":"CWE-185: Incorrect Regular Expression","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-17T21:47:20.530Z"},"source":{"advisory":"GHSA-5cg7-phhv-4qjr","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-23T19:09:15.788977Z","id":"CVE-2026-54506","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-23T19:09:21.053Z"}}]}}}