CVE-2023-40034

Name: CVE-2023-40034
Creator: NVD / NIST
Published: 2023-08-16T21:15:10.087+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.72%

Last modified Jun 17, 2026

CVE-2023-40034 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 0.72% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

0.72%

49.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Woodpecker-Ci	Woodpecker	>= 1.0.0, < 1.0.2

References

https://github.com/woodpecker-ci/woodpecker/commit/6e4c2f84cc84661d58cf1c0e5c421a46070bb105Patch
https://github.com/woodpecker-ci/woodpecker/pull/2221Issue Tracking
https://github.com/woodpecker-ci/woodpecker/pull/2222Issue Tracking
https://github.com/woodpecker-ci/woodpecker/security/advisories/GHSA-4gcf-5m39-98mcVendor Advisory
https://github.com/woodpecker-ci/woodpecker/commit/6e4c2f84cc84661d58cf1c0e5c421a46070bb105Patch
https://github.com/woodpecker-ci/woodpecker/pull/2221Issue Tracking
https://github.com/woodpecker-ci/woodpecker/pull/2222Issue Tracking
https://github.com/woodpecker-ci/woodpecker/security/advisories/GHSA-4gcf-5m39-98mcVendor Advisory

Timeline

Published: Aug 16, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-40034?

How severe is CVE-2023-40034?

CVE-2023-40034 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.

How do I fix CVE-2023-40034?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-40034?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST