What is CVE-2025-31510?

CVE-2025-31510 is a high-severity vulnerability in Lemonldap-ng Lemonldap::ng, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-01-16.

How severe is CVE-2025-31510?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2025-31510 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Lemonldap-ng Lemonldap::ng

CVE-2025-31510

In the portal in LemonLDAP::NG before 2.21.0, cross-site scripting (XSS) allows remote attackers to inject arbitrary web script or HTML (into the login page) via the tab parameter, for Choice authentication.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (29.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Lemonldap-ng Lemonldap::ng — versions 2.0.8, 2.17.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

w4zu/Debian_

References

Frequently asked questions

What is CVE-2025-31510?: CVE-2025-31510 is a high-severity vulnerability in Lemonldap-ng Lemonldap::ng, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-01-16.
How severe is CVE-2025-31510?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2025-31510 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.