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CVE-2020-36658

26
FAUCET Score

CVE-2020-36658 is a high-severity vulnerability (CVSS 8.1) affecting Apache::Session::LDAP before version 0.5, as well as Debian and LemonLDAP::NG products. It stems from the default configuration of Net::LDAPS in Perl, which fails to validate X.509 certificates when connecting to remote LDAP backends, leading to a CWE-295 improper certificate validation issue. This vulnerability has a high potential for impact on confidentiality, integrity, and availability, with a low attack complexity and no user interaction required. Despite its severity, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.5CPE matchmatch criteria
cpe:2.3:a:lemonldap-ng:apache\:\:session\:\:ldap:*:*:*:*:*:perl:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
36.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 11th percentile among its peer group of 8,915 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / LemonLDAPNG/Apache-Session-LDAP/commit/490722b71eed1ed1ab33d58c78578f23e043561f
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2023/01/msg00024.html
Mailing ListThird Party Advisory