PT-2025-52714 · Unknown · Mybb Forums

Andrey Stoykov · CVE-2023-53977 · Published 2025-12-22 · Updated 2025-12-26

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions myBB Forums version 1.8.26

Description myBB Forums version 1.8.26 contains a stored cross-site scripting issue in the forum management system. Authenticated administrators can inject malicious scripts when creating new forums. Attackers can exploit this by inserting script payloads in the forum title field through the 'Forums and Posts' > 'Forum Management' interface. This can lead to arbitrary JavaScript execution when the forum listing is viewed. The vulnerable parameter is the forum title field.

Recommendations Apply a fix to sanitize the forum title field when creating new forums through the 'Forums and Posts' > 'Forum Management' interface.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2023-53977

Affected Products

Mybb Forums

References · 9

• 🔥 https://vulncheck.com/advisories/mybb-forums-stored-cross-site-scripting-via-forum-management · Exploit
• 🔥 https://exploit-db.com/exploits/51136 · Exploit
• https://osv.dev/vulnerability/CVE-2023-53977 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53977 · Security Note
• https://twitter.com/VulmonFeeds/status/2003275549381210339 · Twitter Post
• https://t.me/cveNotify/146894 · Telegram Post
• https://twitter.com/CVEnew/status/2003233941294293365 · Twitter Post
• https://t.me/CVEtracker/40445 · Telegram Post
• https://mybb.com · Note