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Fencer Vulns
high 7.8

CVE-2023-43116 json

Buildkite Elastic CI for AWS symbolic link following vulnerability

published 2023-12-22 2 y ago modified 2026-06-17 4 mo ago also GHSA-7c44-7j7v-w554 , EUVD-2023-3141

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

Summary

A symbolic link following vulnerability in Buildkite Elastic CI for AWS versions prior to 6.7.1 and 5.22.5 allows the buildkite-agent user to change ownership of arbitrary directories via the PIPELINE_PATH variable in the fix-buildkite-agent-builds-permissions script.

Patch / fix

  • go github.com/buildkite/elastic-ci-stack-for-aws/v6 6.7.0
  • buildkite elastic_ci_stack 5.22.5, 6.7.1

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/atredispartners/advisories/blob/master/ATREDIS-2023-0003.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/buildkite/elastic-ci-stack-for-aws/v6
<6.7.0
6.7.0

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access

References

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.