myBB Forums 1.8.26 Stored Cross-Site Scripting via Forum Announcements
myBB Forums 1.8.26 contains a stored cross-site scripting vulnerability in the forum announcement system that allows authenticated administrators to inject malicious scripts when creating announcements. Attackers can exploit this vulnerability by inserting script payloads in the announcement title field when adding ann…
Severity medium: primary CNA CVSS 5.1 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2025-12-22T21:35:35.555Z. Updated 2026-04-07T14:08:18.521Z.