An issue was discovered in LemonLDAP::NG before 2.20.1.

published 2024-11-18 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-45980

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits: 0; none known

An issue was discovered in LemonLDAP::NG before 2.20.1. An Improper Check during session refresh allows an authenticated user to raise their authentication level if the admin configured an "Adaptative authentication rule" with an increment instead of an absolute value.

Patch / fix

fixed in 1 distros 1

lemonldap-ng lemonldap-ng 2.20.1

lemonldap-ng Debian 12 2.16.1+ds-deb12u4
lemonldap-ng Debian 14, Debian 13 2.20.1+ds-1

debian advisories DEBIAN-CVE-2024-52946

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-52946 updated 2025-11-21 cvss 7.1

lemonldap-ng: Improper Authentication Level Check in LemonLDAP::NG

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 23 mo ago (2024-11-21)

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

lemonldap-ng lemonldap-ng

Classification

Weakness

CWE-276 Incorrect Default Permissions

References

Sources

CVE List CVE-2024-52946
NVD CVE-2024-52946

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary