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Security Digest · Vulnerability record · Known exploited

CVE-2025-30066: tj-actions/changed-files GitHub Action Embedded Malicious Code Vulnerability

Exploited in the wild (CISA KEV). tj-actions changed-files before 46 allows remote attackers to discover secrets by reading actions logs.

CISA KEV · added 2025-03-18 CVSS 8.6 High EPSS 72.1% · p99 Check exposure

Updated By erroneo.us Security Desk24 references Seen in the digest for Mar 18, 2025

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

  • Yes, if you run tj-actions changed-files GitHub Action. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-03-18, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-04-08; treat that as the outer limit, not the target.
  • EPSS 72.1%, percentile 99: FIRST’s model estimates a 72.1% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
  • Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
  • Editorial verdict: Check exposure. tj-actions/changed-files: GitHub Action Leaked CI Secrets — The malicious tags were cleaned up within about a day in March 2025; today the job is confirming you rotated any secret that a March 14-15, 2025 workflow run could have printed, and that you pin Actions by SHA.

What it is

tj-actions changed-files before 46 allows remote attackers to discover secrets by reading actions logs. (The tags v1 through v45.0.7 were affected on 2025-03-14 and 2025-03-15 because they were modified by a threat actor to point at commit 0e58ed8, which contained malicious updateFeatures code.)

CISA’s summary

tj-actions/changed-files GitHub Action contains an embedded malicious code vulnerability that allows a remote attacker to discover secrets by reading Github Actions Workflow Logs. These secrets may include, but are not limited to, valid AWS access keys, GitHub personal access tokens (PATs), npm tokens, and private RSA keys.

Weakness type: CWE-506.

Product: tj-actions changed-files GitHub Action · Assigned by: mitre · Published: 2025-03-15

Affected and fixed versions

VendorProductAffected versions (per CVE record)
tj-actionschanged-files1 < 46

Severity scores

Scored byCVSSScoreVector
mitre3.18.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
  • Attack vector: network (remotely reachable)
  • Attack complexity: low
  • Privileges required: none (no login)
  • User interaction: none
  • Scope: changed (can affect other components)

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

  • CISA KEV: added 2025-03-18; federal due date 2025-04-08. Known ransomware use: Unknown.
  • CISA required action: Apply mitigations as set forth in the CISA instructions linked below. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  • CISA SSVC assessment: exploitation active, automatable yes, technical impact partial.
  • FIRST EPSS (model of 2026-10-21): 72.09% probability of exploitation activity in the next 30 days; percentile 99.

Timeline

  • — erroneo.us brief: tj-actions/changed-files: GitHub Action Leaked CI Secrets
  • — CVE record published by mitre
  • — Added to CISA’s Known Exploited Vulnerabilities catalog
  • — CISA remediation deadline for US federal agencies
  • — CVE record last updated

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vendor and project advisories, patches

  1. Listed in CISA KEV notes (github.com) github.com

Vulnerability records

  1. CVE.org record CVE-2025-30066 cve.org
  2. NVD entry CVE-2025-30066 nvd.nist.gov

Government

  1. CISA Known Exploited Vulnerabilities catalog entry cisa.gov
  2. Listed in CISA KEV notes (cisa.gov) cisa.gov

Other references from the CVE record and advisory

  1. github.com github.com
  2. github.com github.com
  3. stepsecurity.io stepsecurity.io
  4. semgrep.dev semgrep.dev
  5. news.ycombinator.com news.ycombinator.com
  6. web.archive.org web.archive.org
  7. news.ycombinator.com news.ycombinator.com
  8. github.com github.com
  9. github.com github.com
  10. sysdig.com sysdig.com
  11. github.com github.com
  12. github.com github.com
  13. github.com github.com
  14. wiz.io wiz.io
  15. stream.security stream.security
  16. sweet.security sweet.security
  17. github.com github.com
  18. blog.gitguardian.com blog.gitguardian.com
  19. cisa.gov cisa.gov

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