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CVE-2023-28609

29
FAUCET Score

CVE-2023-28609 is a critical authentication bypass vulnerability affecting Ansible Semaphore versions prior to 2.8.89, specifically within the api/auth.go component. With a CVSS score of 9.8, this flaw allows unauthenticated attackers to remotely compromise affected systems with high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.8.89CPE matchmatch criteria
cpe:2.3:a:ansible-semaphore:ansible_semaphore:*:*:*:*:*:ansible:*:*

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
0.87%
Probability of exploitation in next 30 days
EPSS Percentile
55.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0087 is in the 40th percentile among its peer group of 36,835 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 (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/ansible-semaphore/semaphoreFixed in: 2.8.89

Vendor Advisories (1)

goGHSA-pmhg-cmjc-3875critical

Ansible Semaphore mishandles authentication

Mar 18, 2023

References

github.com / ansible-semaphore/semaphore/commit/3e4a62b7f2b1ef0660c9fb839818a53c80a5a8b1
Patch
github.com / ansible-semaphore/semaphore/releases/tag/v2.8.89
Release Notes