CVE-2026-33683 Details
Description
WWBN AVideo is an open source video platform. In versions up to and including 26.0, a sanitization order-of-operations flaw in the user profile "about" field allows any registered user to inject arbitrary JavaScript that executes when other users visit their channel page. The `xss_esc()` function entity-encodes input before `strip_specific_tags()` can match dangerous HTML tags, and `html_entity_decode()` on output reverses the encoding, restoring the raw malicious HTML. Commit 7cfdc380dae1e56bbb5de581470d9e9957445df0 contains a patch.
A stored cross-site scripting vulnerability has been identified in WWBN AVideo versions through 26.0. The issue arises from a flaw in the order of operations for sanitizing the user profile 'about' field. This flaw allows registered users to inject arbitrary JavaScript that executes when others visit their channel page. The vulnerability is rooted in the `xss_esc()` function, which entity-encodes input before the `strip_specific_tags()` function can remove dangerous HTML tags. As a result, entity-encoded scripts are not sanitized and can be executed when the 'about' field is viewed.
Users can update to AVideo version 27.0 or later, where this vulnerability has been addressed. Instructions for updating can be found in the AVideo documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 25, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/WWBN/AVideo/commit/7cfdc380dae1e56bbb5de581470d9e9957445df0 | [email protected] | Patch |
| https://github.com/WWBN/AVideo/security/advisories/GHSA-ghx5-7jjg-q2j7 | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| wwbn avideo | <= 26.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 25, 2026 | Initial Analysis | [email protected] |
| Mar 23, 2026 | New CVE Received | [email protected] |