TI-2023-16829 Aliases CVE-2023-33961

Leantime Stored Cross-site Scripting Vulnerability

MEDIUM 41CWE-79Published 2023-05-30 · Updated 2025-01-10

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · High · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00394 33rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Leantime	leantime	=> 2.3.21	—	No fix listed	CNA

leantime VendorLeantime Affected => 2.3.21 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:leantime:leantime::::::::	2.3.21	Vulnerable	Leantime

cpe:2.3:a:leantime:leantime:*:*:*:*:*:*:*:* Versions 2.3.21 Vulnerable ·Leantime

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-33961

References

Advisory 1

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

TI-2024-18279 Leantime 3.0.6 is vulnerable to Cross Site Request Forgery (CSRF). CVSS 3.1HIGH 8.8
TI-2024-18354 Cross Site Scripting vulnerability in Leantime v3.0.6 allows attackers to execute… CVSS 3.1HIGH 7.6
TI-2024-18353 Cross Site Scripting vulnerability in Leantime 3.0.6 allows a remote attacker to execute… CVSS 3.1MEDIUM 5.4
TI-2024-18280 Leantime 3.0.6 is vulnerable to HTML Injection via /dashboard/show#/tickets/newTicket. CVSS 3.1MEDIUM 4.7
TI-2020-04348 Time-based blind injection in Leantime CVSS 3.1HIGH 8.8
TI-2023-24586 Authenticated SQL Injection in leantime CVSS 3.1MEDIUM 6.5

See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences