TI-2023-20924 Aliases CVE-2023-40034 GHSA-4gcf-5m39-98mc

Repositoty takeover in woodpecker-ci

LOW 39CWE-20Published 2023-08-16 · Updated 2024-10-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

Woodpecker is a community fork of the Drone CI system. In affected versions an attacker can post malformed webhook data witch lead to an update of the repository data that can e.g. allow the takeover of an repo. This is only critical if the CI is configured for public usage and connected to a forge witch is also in public usage. This issue has been addressed in version 1.0.2. Users are advised to upgrade. Users unable to upgrade should secure the CI system by making it inaccessible to untrusted entities, for example, by placing it behind a firewall.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00883 59th percentileScored 2026-11-07

Fix Fixed woodpecker (woodpecker-ci): 1.0.2github.com/woodpecker-ci/woodpecker (Go): 1.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
woodpecker-ci	woodpecker	1.0.0 to before 1.0.2	1.0.2	Patch available	CNA
—	github.com/woodpecker-ci/woodpecker (Go)	1.0.0 to before 1.0.2	1.0.2	Patch available	GHSA-4gcf-5m39-98mc

woodpecker Vendorwoodpecker-ci Affected 1.0.0 to before 1.0.2 Fixed in 1.0.2 Patch available CNA
github.com/woodpecker-ci/woodpecker (Go) Vendor— Affected 1.0.0 to before 1.0.2 Fixed in 1.0.2 Patch available GHSA-4gcf-5m39-98mc

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:woodpecker-ci:woodpecker::::::::	1.0.0 to before 1.0.2	Vulnerable	woodpecker-ci

cpe:2.3:a:woodpecker-ci:woodpecker:*:*:*:*:*:*:*:* Versions 1.0.0 to before 1.0.2 Vulnerable ·woodpecker-ci

Remediation

Fix · CNA woodpecker (woodpecker-ci) Fixed in 1.0.2
Fix · GHSA-4gcf-5m39-98mc github.com/woodpecker-ci/woodpecker (Go) Fixed in 1.0.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2023-40034
2026-10-03 Alias added: GHSA-4gcf-5m39-98mc

References

Patch 1

https://github.com/woodpecker-ci/woodpecker/commit/6e4c2f84cc84661d58cf1c0e5c421a46070bb105

Advisory 2

Other 4

TI-2024-27474 Custom environment variables allow to alter execution flow of plugins in Woodpecker CVSS 3.1HIGH 8.8
TI-2024-27473 Custom workspace allow to overwrite plugin entrypoint executable in Woodpecker CVSS 3.1HIGH 8.8
TI-2022-12293 Woodpecker before 0.15.1 allows XSS via build logs because web/src/components/repo/build/BuildLog.vue lacks escaping. CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences