Code injection in ansible semaphore

published 2023-08-28 3 y ago modified 2026-06-17 4 mo ago also GHSA-3r32-cp7v-5wq4 , EUVD-2023-2198

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

An issue in ansible semaphore v.2.8.90 allows a remote attacker to execute arbitrary code via a crafted payload to the extra variables parameter.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-10-02)

Exploit prediction

1.73% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

alevsk.com https://www.alevsk.com/2023/07/a-quick-story-of-security-pitfalls-with-execcommand-in-software-integrations/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
GitHub	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
go	github.com/ansible-semaphore/semaphore	<=2.8.90	no fix listed

Classification

Weakness

CWE-94 Improper Control of Generation of Code

References

alevsk.com /2023/07/a-quick-story-of-security-pitfalls-with-execcommand-in-software-integrations/
exploit, third-party-advisory
gist.github.com /Alevsk/1757da24c5fb8db735d392fd4146ca3a
web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2023-39059
advisory
github.com /ansible-semaphore/semaphore
package
alevsk.com /2023/07/a-quick-story-of-security-pitfalls-with-execcommand-in-software-integrations
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary