Unrated severityNVD Advisory· Published Dec 22, 2025· Updated Apr 7, 2026
myBB Forums 1.8.26 Stored Cross-Site Scripting via Forum Management
CVE-2023-53977
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2<=1.8.26+ 1 more
- (no CPE)range: <=1.8.26
- (no CPE)range: 1.8.26
Patches
Vulnerability mechanics
References
3- www.exploit-db.com/exploits/51136mitreexploit
- www.vulncheck.com/advisories/mybb-forums-stored-cross-site-scripting-via-forum-managementmitrethird-party-advisory
- mybb.commitreproduct
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