CVE-2023-33961: Leantime Stored Cross-site Scripting Vulnerability

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-30 · updated 2026-06-17
Weakness: CWE-79

Description

Leantime is a lean open source project management system. Starting in version 2.3.21, an authenticated user with commenting privileges can inject malicious Javascript into a comment. Once the malicious comment is loaded in the browser by a user, the malicious Javascript code executes. As of time of publication, a patch does not exist.

Affected products

Leantime: from 2.3.21

References

https://github.com/Leantime/leantime/security/advisories/GHSA-359m-fp6q-65r7
https://github.com/Leantime/leantime/security/advisories/GHSA-359m-fp6q-65r7

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