Zero-day vulnerability in changed-files

Embedded malicious code (backdoor)
CVE-2025-30066

Not patched

Vulnerability details

Advisory: SB2025031746 - Embedded malicious code in tj-actions changed-files

Vulnerable component: changed-files

CVE-ID: CVE-2025-30066

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:H/RL:U/RC:C

CWE-ID: CWE-506 - Embedded Malicious Code

Description:

The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to presence of embedded malicious functionality in the application code (aka backdoor). A remote attacker can discover secrets by reading actions logs.

Note, the vulnerability is being exploited in the wild.

External links:

https://www.wiz.io/blog/github-action-tj-actions-changed-files-supply-chain-attack-cve-2025-30066

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.