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CVE-2023-45239

29
FAUCET Score

CVE-2023-45239 is a critical remote code execution vulnerability affecting tac_plus, including versions used by Facebook and Fedora, due to insufficient input validation. An unauthenticated attacker can inject shell commands by manipulating username, remote address, or NAC address fields, leading to full compromise of the tac_plus server. While no public exploits or active exploitation are currently reported, its CVSS score of 9.8 and FAUCET Risk Score of 97/100 highlight its severe potential impact. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
< 2023-10-05CPE matchmatch criteria
cpe:2.3:a:facebook:tac_plus:*:*:*:*:*:*:*:*
39CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.81%
Probability of exploitation in next 30 days
EPSS Percentile
76.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0181 is in the 64th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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 / facebook/tac_plus/pull/41
ExploitPatch
github.com / facebook/tac_plus/security/advisories/GHSA-p334-5r3g-4vx3
Vendor Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/X4J7ZYMFZB4G4OU5EDJPQLP6F6RKDGIH
Mailing ListThird Party Advisory