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CVE-2020-13881

25
FAUCET Score

CVE-2020-13881 is a high-severity information disclosure vulnerability affecting pam_tacplus versions 1.3.8 through 1.5.1, as well as products from Arista, Canonical, and Debian. It allows the TACACS+ shared secret to be logged via syslog when debug logging and journald are enabled. With a CVSS score of 7.5, this vulnerability has a network attack vector, low attack complexity, and can lead to a complete compromise of confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.3.8, <= 1.5.1CPE matchmatch criteria
cpe:2.3:a:pam_tacplus_project:pam_tacplus:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.67%
Probability of exploitation in next 30 days
EPSS Percentile
74.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0167 is in the 57th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 / kravietz/pam_tacplus/commit/4a9852c31c2fd0c0e72fbb689a586aabcfb11cb0
PatchThird Party Advisory
github.com / kravietz/pam_tacplus/issues/149
Issue TrackingThird Party Advisory
lists.debian.org / debian-lts-announce/2020/06/msg00007.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2021/08/msg00006.html
Mailing ListThird Party Advisory
usn.ubuntu.com / 4521-1
Third Party Advisory
arista.com / en/support/advisories-notices/security-advisories/11705-security-advisory-50
Third Party Advisory
openwall.com / lists/oss-security/2020/06/08/1
Mailing ListPatchThird Party Advisory