CVE-2026-54506

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.

CVSS v3 7.6 HIGH

7.6^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.3 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/givanz/Vvveb/commit/20a01ef08559ffdc97205edeecde86c8ea27e567
https://github.com/givanz/Vvveb/releases/tag/1.0.8.5
https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr
https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr

Configurations

No configuration.

History

23 Sep 2026, 20:17

Type	Values Removed	Values Added
References	~~() https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr -~~	() https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr -

17 Sep 2026, 22:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 22:17

Updated : 2026-09-23 20:17

NVD link : CVE-2026-54506

Mitre link : CVE-2026-54506

CVE.ORG link : CVE-2026-54506

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-116

Improper Encoding or Escaping of Output

CWE-185

Incorrect Regular Expression

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