{"id":"CVE-2026-54506","title":"Vvveb is a powerful and easy to use CMS with page builder to build websites, blogs or ecommerce stores","summary":"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 sys…","severity":"high","cvss":7.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","cwe":["CWE-79","CWE-116","CWE-185"],"vendor":"givanz","product":"Vvveb","affected":["Vvveb < 1.0.8.5"],"published":"2026-09-17","updated":"2026-09-23","sourceUpdated":"2026-09-23T20:17:11.123","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54506","references":[{"url":"https://github.com/givanz/Vvveb/commit/20a01ef08559ffdc97205edeecde86c8ea27e567","label":"security-advisories@github.com"},{"url":"https://github.com/givanz/Vvveb/releases/tag/1.0.8.5","label":"security-advisories@github.com"},{"url":"https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr","label":"security-advisories@github.com"},{"url":"https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-23T19:09:15.788977Z"},"epss":0.00252,"epssPercentile":0.17009,"ingestedAt":"2026-09-17T22:30:21.399Z","slug":"CVE-2026-54506","body":"## Overview\n\nVvveb 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":41.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":209853,"id":"CVE-2026-54506","ts":1790191922800,"field":"exploit_available","old":"false","new":"true"}]}