VULNERABILITY INTELLIGENCE

CVE-2023-53977

CVSS score5.4 MEDIUM
EPSS probability0.24%
CISA KEVNot currently listed
Published2025-12-22
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Description

myBB Forums 1.8.26 contains a stored cross-site scripting vulnerability in the forum management system that allows authenticated administrators to inject malicious scripts when creating new forums. Attackers can exploit this vulnerability by inserting script payloads in the forum title field when adding new forums through the 'Forums and Posts' > 'Forum Management' interface, causing arbitrary JavaScript to execute when the forum listing is viewed.

Weakness classification

  • disclosure@vulncheck.com: CWE-79

Primary references