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.

Affected products

MyBB/myBB Forumsllm-create
Range: <=1.8.26
Mybb/myBB forumsv5
Range: 1.8.26

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.exploit-db.com/exploits/51136mitreexploit
www.vulncheck.com/advisories/mybb-forums-stored-cross-site-scripting-via-forum-managementmitrethird-party-advisory
mybb.commitreproduct

News mentions

No linked articles in our index yet.

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