CVE-2026-89246: WWBN AVideo CSV Formula Injection via myComments.download.php

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-11 · updated 2026-09-11
Weakness: CWE-1236

Description

WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a CSV formula injection vulnerability in the myComments.download.php endpoint that fails to sanitize spreadsheet formula prefixes in comment text. Authenticated users can inject formulas starting with =, +, -, or @ characters that execute when administrators or video owners open the exported CSV file in spreadsheet applications.

References

https://github.com/WWBN/AVideo/security/advisories/GHSA-766f-9gfh-v4wj
https://www.vulncheck.com/advisories/wwbn-avideo-csv-formula-injection-via-mycomments-download-php
https://github.com/WWBN/AVideo/security/advisories/GHSA-766f-9gfh-v4wj

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