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.
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
History
27 Dec 2025, 17:15
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://www.vulncheck.com/advisories/mybb-forums-stored-cross-site-scripting-via-forum-announcements - Exploit, Third Party Advisory | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.4 |
26 Dec 2025, 16:06
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Mybb
Mybb mybb |
|
| References | () https://mybb.com/ - Product | |
| References | () https://www.exploit-db.com/exploits/51136 - Exploit | |
| References | () https://www.vulncheck.com/advisories/mybb-forums-stored-cross-site-scripting-via-forum-announcements - Third Party Advisory, Exploit | |
| CPE | cpe:2.3:a:mybb:mybb:1.8.26:*:*:*:*:*:*:* |
22 Dec 2025, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
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')