VulnerabilityModified

CVE-2023-53976

MEDIUM 5.1EPSS 0.24%

Does this matter?

Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 4.0: 5.1 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.24% probability · 15th percentile
CISA KEV: Not listed
Weakness: CWE-79
Affected: mybb/mybb
Source: disclosure@vulncheck.com

References

https://mybb.com/Product
https://www.exploit-db.com/exploits/51136Exploit
https://www.vulncheck.com/advisories/mybb-forums-stored-cross-site-scripting-via-template-managementExploit, Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2021-41866

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.