HOMEVULNERABILITIESCVE-2019-15941
CRITICAL

CVE-2019-15941

CWE-863Published: September 25, 2019· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

OpenID Connect Issuer in LemonLDAP::NG 2.x through 2.0.5 may allow an attacker to bypass access control rules via a crafted OpenID Connect authorization request. To be vulnerable, there must exist an OIDC Relaying party within the LemonLDAP configuration with weaker access control rules than the target RP, and no filtering on redirection URIs.

NVD Source

Technical Analysis

CVE-2019-15941 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
lemonldap-ng1 product(s)
lemonldap\
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues/1881
ADVISORYhttps://projects.ow2.org/view/lemonldap-ng/lemonldap-ng-2-0-6-is-out/
ADVISORYhttps://seclists.org/bugtraq/2019/Sep/46
ADVISORYhttps://www.debian.org/security/2019/dsa-4533
ADVISORYhttps://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues/1881
ADVISORYhttps://projects.ow2.org/view/lemonldap-ng/lemonldap-ng-2-0-6-is-out/
ADVISORYhttps://seclists.org/bugtraq/2019/Sep/46
ADVISORYhttps://www.debian.org/security/2019/dsa-4533

All References (8)

→
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues/1881Third Party Advisory
→
https://projects.ow2.org/view/lemonldap-ng/lemonldap-ng-2-0-6-is-out/Third Party Advisory
→
https://seclists.org/bugtraq/2019/Sep/46Mailing List · Third Party Advisory
→
https://www.debian.org/security/2019/dsa-4533Third Party Advisory
→
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues/1881Third Party Advisory
→
https://projects.ow2.org/view/lemonldap-ng/lemonldap-ng-2-0-6-is-out/Third Party Advisory
→
https://seclists.org/bugtraq/2019/Sep/46Mailing List · Third Party Advisory
→
https://www.debian.org/security/2019/dsa-4533Third Party Advisory

Quick Facts

CVE IDCVE-2019-15941
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-863
CISA KEVNo
Affected2 vendor(s)
PublishedSep 25, 2019

Related CVEs (CWE-863)

CVE-2026-48303
10.0
CVE-2023-4617
10.0
CVE-2026-48286
10.0
CVE-2026-48321
10.0
CVE-2021-38503
10.0
CVE-2018-18815
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-15941 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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