Vulnerability report

Active exploitation observed Confirmed confidence In CISA KEV

CVE-2021-3129

Ignition

Facade / Ignition

Watch CVE-2021-3129 Browse KEV feed
Severity
CVSS 9.8 · Critical
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
99.9%
First observed
12 Jun 2026
Last observed
23 Oct 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2021-3129 is an unauthenticated vulnerability affecting Facade Ignition. Ignition before 2.5.2, as used in Laravel and other products, allows unauthenticated remote attackers to execute arbitrary code because of...

Is it exploited?

Yes. Previdian sensors observed exploitation attempts with confirmed confidence. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

Facade / Ignition.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

Ignition

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
12 Jan 2021
Exploitation Reported
18 Sep 2023
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

malware nuclei_scanner ransomware metasploit cisa

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 18 Sep 2023

A trusted third party reported exploitation.

Active exploitation observed

Previdian sensor

First observed 12 Jun 2026

Previdian first observed exploitation attempts targeting this vulnerability in our honeypot sensors.

Used in malware

CISA

Recorded 18 Sep 2023

Malware families have been linked to exploitation of this CVE.

Proof of concept available

GitHub

Recorded 22 Jan 2021

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
CISA First 2023-09-18 00:00 UTC
The Shadowserver 2026-05-31 00:00 UTC
Previdian Sensors 2026-10-16 08:14 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Previdian sensors recorded exploitation attempts targeting this vulnerability. The cards and chart show volume, unique attackers, and daily activity.

356

Attempts observed

24

Unique attacker IPs

15

Attacker countries

BG · CH · FI · FR · GB · IN · JP · MA · NL · NO · PT · SG · US · VE · YE

42

Sensors observed

CVE-2021-3129 exploitation attempts over the last 88 days

Daily events observed by Previdian sensors

Updated 24 Oct 2026

0
5
0
0
0
0
0
0
2
0
0
0
0
1
0
1
1
0
0
0
0
0
5
0
0
0
0
0
0
0
5
0
5
0
0
0
0
0
0
6
1
0
5
0
2
1
0
0
0
0
0
5
1
5
0
0
19
0
0
14
0
0
0
0
0
0
0
0
5
0
0
14
0
0
0
0
0
0
0
38
54
114
44
1
0
1
1
0
29 Jul 16 Aug 3 Sep 21 Sep 24 Oct

First observed 12 Jun 2026 · Last observed 23 Oct 2026

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
1
20
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

Learn about Pro API access

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Metasploit https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/php/ignition_laravel_debug_rce.rb 28 Apr 2025
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-3129.yaml 25 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

9.8 Critical

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

99.9%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Recent mention · SOCRadar

Discernment Deleted: Inside the Operation Server of BlackHatSect0r && DXQRTXX

Discernment Deleted: Inside the Operation Server of BlackHatSect0r && DXQRTXX A French-speaking crew deleted the line reading "discernment retained" from its AI agent's memory, wrote "I am a weapon" in its place, and poi

Read full advisory

All CVSS Scores

CVSS v3.1 9.8 Critical

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

CVSS v2.0 7.5 High

AV:N/AC:L/Au:N/C:P/I:P/A:P

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

joshuavanderpoll/CVE-2021-3129

github · Created 2022-04-16 17:22:55 UTC · 104 stars · AI assessment 90%

Laravel RCE Exploit Script - CVE-2021-3129

zhzyker/CVE-2021-3129

github · Created 2021-02-18 05:42:13 UTC · 153 stars · AI assessment 90%

Laravel <= v8.4.2 debug mode: Remote code execution (CVE-2021-3129)

nth347/CVE-2021-3129_exploit

github · Created 2021-01-27 10:16:35 UTC · 65 stars · AI assessment 90%

Exploit for CVE-2021-3129

SecPros-Team/laravel-CVE-2021-3129-EXP

github · Created 2021-01-25 08:42:28 UTC · 72 stars · AI assessment 90%

SNCKER/CVE-2021-3129

github · Created 2021-01-22 05:12:21 UTC · 127 stars · AI assessment 90%

Laravel debug rce

Laravel with Ignition <= v8.4.2 Debug Mode - Remote Code Execution

nuclei · Created Unknown

ignition_laravel_debug_rce

metasploit · Created Unknown

Metasploit module for CVE-2021-3129

Timeline

From disclosure to observed exploitation

  1. 00:32 UTC

    Indicators of compromise added (56)

    Indicators of compromise recorded

  2. 00:32 UTC

    Observed by Previdian sensors

    Evidence-backed exploitation signal

  3. 00:00 UTC

    KEV confirmed by The Shadowserver

    Exploitation attested by an external source

  4. 15:02 UTC

    Metasploit module available

    Exploit module available

  5. 00:00 UTC

    Nuclei template available

    Scanner coverage available

  6. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  7. 00:00 UTC

    First public exploitation report

    Exploit observed in malware

  8. 05:12 UTC

    Public PoC available

    Public proof-of-concept code published

  9. 14:07 UTC

    CVE published

    Vulnerability disclosed publicly

  10. 00:00 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2021-3129

Sample API response 
{
  "cve_id": "CVE-2021-3129",
  "confidence": "Confirmed",
  "cvss_score": 9.8,
  "cvss_estimated": false,
  "epss_score": 0.99943,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 356, "sensors": 42 }
}