CVE-2020-24660 json
Lack of URL normalization may lead to authorization bypass when URL access rules are used
published 2020-09-09 6 y ago modified 2026-07-08 4 mo 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
Exploit prediction
2.46% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).
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
References
-
github.com
/LemonLDAPNG/node-lemonldap-ng-handler/commit/136aa83ed431462fa42ce17b7f9b24e056de06be
web
-
gitlab.ow2.org
/lemonldap-ng/lemonldap-ng/-/issues/2290
web, exploit, third-party-advisory
-
debian.org
/security/2020/dsa-4762
vendor-advisory, web, third-party-advisory
-
github.com
/LemonLDAPNG/node-lemonldap-ng-handler/security/advisories/GHSA-x44x-r84w-8v67
web, third-party-advisory
-
github.com
/LemonLDAPNG/node-lemonldap-ng-handler/releases/tag/0.5.2
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-24660
advisory
-
github.com
/LemonLDAPNG/node-lemonldap-ng-handler
package
-
snyk.io
/vuln/SNYK-JS-NODELEMONLDAPNGHANDLER-655999
web
-
npmjs.com
/package/lemonldap-ng-handler
web
Sources
- CVE List CVE-2020-24660
- GitHub Advisory GHSA-x44x-r84w-8v67
- NVD CVE-2020-24660
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