myBB Forums 1.8.26 contains a stored cross-site scripting vulnerability in the template management system that allows authenticated administrators to inject malicious scripts when creating new templates. Attackers can exploit this vulnerability by inserting script payloads in the template title field when adding new templates through the 'Templates and Style' > 'Templates' > 'Manage Templates' > 'Global Templates' interface, causing arbitrary JavaScript to execute when the template is viewed.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sun, 28 Dec 2025 04:30:00 +0900

Type Values Removed Values Added
References

Sun, 28 Dec 2025 02:00:00 +0900

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}


Sat, 27 Dec 2025 01:15:00 +0900

Type Values Removed Values Added
CPEs cpe:2.3:a:mybb:mybb:1.8.26:*:*:*:*:*:*:*

Wed, 24 Dec 2025 08:00:00 +0900

Type Values Removed Values Added
First Time appeared Mybb
Mybb mybb
Vendors & Products Mybb
Mybb mybb

Tue, 23 Dec 2025 08:15:00 +0900

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 23 Dec 2025 06:45:00 +0900

Type Values Removed Values Added
Description myBB Forums 1.8.26 contains a stored cross-site scripting vulnerability in the template management system that allows authenticated administrators to inject malicious scripts when creating new templates. Attackers can exploit this vulnerability by inserting script payloads in the template title field when adding new templates through the 'Templates and Style' > 'Templates' > 'Manage Templates' > 'Global Templates' interface, causing arbitrary JavaScript to execute when the template is viewed.
Title myBB Forums 1.8.26 Stored Cross-Site Scripting via Template Management
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2025-12-30T14:09:12.058Z

Reserved: 2025-12-20T16:31:20.899Z

Link: CVE-2023-53976

cve-icon Vulnrichment

Updated: 2025-12-27T19:03:58.664Z

cve-icon NVD

Status : Modified

Published: 2025-12-22T22:16:03.020

Modified: 2025-12-27T19:15:39.940

Link: CVE-2023-53976

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-12-24T07:39:55Z

Weaknesses