CVE-2023-53978

myBB Forums 1.8.26 Stored Cross-Site Scripting via Forum Announcements

Published: Dec 22, 2025Updated: Dec 27, 2025 Sources: CVE List NVDCWE-79

5.4MEDIUM

Description

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 announcements through the 'Forums and Posts' > 'Forum Announcements' interface, causing arbitrary JavaScript to execute when the announcement is displayed on the forum.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:RUser Interaction

Required

Scope

S:CScope

Changed

Impact

C:LConfidentiality

Low

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-79

Affected Products

Mybb

oss-projectaka mybb forums

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Execution

Initial Access

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References

https://www.exploit-db.com/exploits/51136

exploit-db.com

https://mybb.com/

mybb.com

https://www.vulncheck.com/advisories/mybb-forums-stored-cross-site-scripting-via-forum-announcements

vulncheck.com

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