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Fencer Intel
critical 9.8

CVE-2020-24660 json

Lack of URL normalization may lead to authorization bypass when URL access rules are used

published 6y ago modified 4mo ago also GHSA-x44x-r84w-8v67 , EUVD-2020-1371

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

An issue was discovered in LemonLDAP::NG through 2.0.8, when NGINX is used. An attacker may bypass URL-based access control to protected Virtual Hosts by submitting a non-normalized URI. This also affects versions before 0.5.2 of the "Lemonldap::NG handler for Node.js" package.

Patch / fix

  • npm lemonldap-ng-handler 0.5.2
  • lemonldap-ng Debian 14, Debian 13, Debian 12 2.0.9+ds-1

debian advisories DEBIAN-CVE-2020-24660

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Exploit prediction

2.46% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • gitlab.ow2.org https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2290 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
npm lemonldap-ng-handler
<0.5.2
0.5.2

Classification

Weakness

References

Sources

Fencer Intel 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.