Cross-site scripting in lemonldap-ng LemonLDAP::NG
Priority LOW 38CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00375 31st percentileScored 2026-11-07
Fix Fixed LemonLDAP::NG (lemonldap-ng): 2.16.5, 2.21.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
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 |
|---|---|---|---|---|---|
| lemonldap-ng | LemonLDAP::NG | 2.0.8 to before 2.16.5; 2.17.0 to before 2.21.0 | 2.16.5, 2.21.0 | Patch available | CNA |
- LemonLDAP::NG Vendorlemonldap-ng Affected 2.0.8 to before 2.16.5; 2.17.0 to before 2.21.0 Fixed in 2.16.5, 2.21.0 Patch available CNA
Remediation
- Fix · CNA LemonLDAP::NG (lemonldap-ng) Fixed in 2.16.5, 2.21.0
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2025-31510
- 2026-10-03 Alias added: GHSA-55mm-vp96-5r7h
References
More lemonldap-ng vulnerabilities
- TI-2023-13366 An issue was discovered in LemonLDAP::NG before 2.16.1. CVSS 3.1CRITICAL 9.8
- TI-2024-32628 A cross-site scripting (XSS) vulnerability in LemonLDAP::NG before 2.19.3 allows remote… CVSS 3.1MEDIUM 6.1
- TI-2022-17335 In LemonLDAP::NG before 2.0.15. CVSS 3.1MEDIUM 5.9
- TI-2023-23963 A Server-Side Request Forgery issue in the OpenID Connect Issuer in LemonLDAP::NG before… CVSS 3.1MEDIUM 4.3
- TI-2019-14263 In LemonLDAP::NG (aka lemonldap-ng) before 2.0.7, the default Apache HTTP Server… CVSS 3.1CRITICAL 9.8
- TI-2019-09012 LemonLDAP::NG -2.0.3 has Incorrect Access Control. CVSS 3.0CRITICAL 9.8
Sources
- CVE-2025-31510 · CVE Program
- CVE-2025-31510 · NVD
- FIRST EPSS
- GHSA-55mm-vp96-5r7h · GitHub Advisory Database · CC BY 4.0
- CVE-2025-31510 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences