CVE-2023-53978

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://mybb.com/	Product
https://www.exploit-db.com/exploits/51136	Exploit
https://www.vulncheck.com/advisories/mybb-forums-stored-cross-site-scripting-via-forum-announcements	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:mybb:mybb:1.8.26:*:*:*:*:*:*:*

History

No history.

Information

Published : 2025-12-22 22:16

Updated : 2025-12-27 17:15

NVD link : CVE-2023-53978

Mitre link : CVE-2023-53978

CVE.ORG link : CVE-2023-53978

JSON object : View

Products Affected

mybb

mybb

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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