What is CVE-2021-3129?

CVE-2021-3129 is a critical-severity vulnerability in Facade Ignition. CVSS score: 9.8/10. Published 2021-01-12.

How severe is CVE-2021-3129?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-3129 known to be exploited?

Yes. CVE-2021-3129 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-09-18), indicating it is being actively exploited. 179 public proof-of-concept repositories are indexed.

Vulnerability in Facade Ignition

CVE-2021-3129

Ignition before 2.5.2, as used in Laravel and other products, allows unauthenticated remote attackers to execute arbitrary code because of insecure usage of file_get_contents() and file_put_contents(). This is exploitable on sites using debug mode with Laravel before 8.4.2.

Published 2021-01-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.999 (100.0th percentile), scored 2026-10-05.

Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2023-09-18. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2023-10-09.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

www.ambionics.io/blog/laravel-debug-rce (Exploit, Third Party Advisory)
github.com/facade/ignition/pull/334 (Patch, Third Party Advisory)
packetstormsecurity.com/files/162094/Ignition-2.5.1-Remote-Code-Execution.html (Exploit, VDB Entry, Third Party Advisory)
packetstormsecurity.com/files/165999/Ignition-Remote-Code-Execution.html (Exploit, VDB Entry, Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2021-3129?: CVE-2021-3129 is a critical-severity vulnerability in Facade Ignition. CVSS score: 9.8/10. Published 2021-01-12.
How severe is CVE-2021-3129?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-3129 known to be exploited?: Yes. CVE-2021-3129 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-09-18), indicating it is being actively exploited. 179 public proof-of-concept repositories are indexed.