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Fencer Intel
critical 9.8

CVE-2021-3129 kev+ ransomware in the critical feed json

Unauthenticated remote code execution in Ignition

published 5y ago modified 4mo ago also GHSA-4qwp-7c67-jmcc , EUVD-2021-0599

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2023-09-18, used in ransomware
epss
99.9%
EPSS 99.9% chance of exploitation in 30 days, percentile 99.9%
public exploits
2
Metasploit and Exploit-DB, plus a Nuclei check

Summary

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.

Patch / fix

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

  • packagist facade/ignition 1.6.15, 1.16.14, 2.4.2, 2.5.2
  • facade ignition 2.5.2

Is CVE-2021-3129 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. Published
  2. First public exploit (Metasploit exploit/multi/php/ignition_laravel_debug_rce)
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
3y ago
Patch by
2023-10-09 (3y ago)
Ransomware
Known to be used in ransomware campaigns
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor, product
Laravel, Ignition
CISA name
Laravel Ignition File Upload Vulnerability

ATT&CK techniques

How it is exploited and what it leads to, in MITRE ATT&CK terms.

  • T1190 Exploit Public-Facing Application exploitation
  • T1059 Command and Scripting Interpreter primary impact

kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
last yr.

Exploit prediction

99.94% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Metasploit exploit/multi/php/ignition_laravel_debug_rce Unauthenticated remote code execution in Ignition metasploit exploit, excellent rank, 2021-01-13
  • EDB-49424 Laravel 8.4.2 debug mode - Remote code execution webapps, 2021-01-14
  • Nuclei template Laravel with Ignition <= v8.4.2 Debug Mode - Remote Code Execution nuclei detection template
  • ambionics.io https://www.ambionics.io/blog/laravel-debug-rce referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/162094/Ignition-2.5.1-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/165999/Ignition-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H

Affected packages

ecosystem package affected fixed in
packagist facade/ignition
>=2.5.0, <2.5.2
>=2.0.0, <2.4.2
>=1.7.0, <1.16.14
<1.6.15
2.5.2
2.4.2
1.16.14
1.6.15

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.