# CVE-2021-40874: lemonldap-ng: An issue was discovered in LemonLDAP::NG (aka lemonldap-ng) 2.0.13

CVE-2021-40874 is fixed in lemonldap-ng on 1 platform, first by DEBIAN-CVE-2021-40874, released July 18, 2022. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2021-40874
- Priority: Urgent
- CVSS: 9.8 (critical)
- EPSS: 0.0119
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 18, 2022

## Description

An issue was discovered in LemonLDAP::NG (aka lemonldap-ng) 2.0.13. When using the RESTServer plug-in to operate a REST password validation service (for another LemonLDAP::NG instance, for example) and using the Kerberos authentication method combined with another method with the Combination authentication plug-in, any password will be recognized as valid for an existing user.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | lemonldap-ng Debian 12.15 (bookworm) | 2.0.14+ds-1 | [DEBIAN-CVE-2021-40874](https://patchblox.com/security/data/fix/linux/debian-cve-2021-40874.md) | Jul 18, 2022 |
| Linux | lemonldap-ng Debian 13.5 (trixie) | 2.0.14+ds-1 | [DEBIAN-CVE-2021-40874](https://patchblox.com/security/data/fix/linux/debian-cve-2021-40874.md) | Jul 18, 2022 |
| Linux | lemonldap-ng Debian 14 | 2.0.14+ds-1 | [DEBIAN-CVE-2021-40874](https://patchblox.com/security/data/fix/linux/debian-cve-2021-40874.md) | Jul 18, 2022 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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