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Public proof of conceptFix available

CVE-2021-43617

A public proof of concept exists; no exploitation attested.

  • Published2021-11-14
  • WeaknessCWE-434

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Laravel Framework through 8.70.2 does not sufficiently block the upload of executable PHP content because Illuminate/Validation/Concerns/ValidatesAttributes.php lacks a check for .phar files, which are handled as application/x-httpd-php on systems based on Debian. NOTE: this CVE Record is for Laravel Framework, and is unrelated to any reports concerning incorrectly written user applications for image upload.

Timeline

dates in UTC
  1. 2021-11-1416:15CVE publishedNVD
  2. 2021-11-15Exploit-DB entryExploit-DB

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-43617?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-43617?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Laravel framework
BranchAffectedFixed in
8.70≤ 8.70.2no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • laravel/frameworkTuxCare:Packagistfrom 5.5.50 · fixed in 5.5.50-p2+tuxcare
  • php-laravel-frameworkDebian:14all versions · fixed in 6.20.14+dfsg-3
  • php-laravel-frameworkDebian:13all versions · fixed in 6.20.14+dfsg-3
  • php-laravel-frameworkDebian:12all versions · fixed in 6.20.14+dfsg-3

Full record on NVD

Fix

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-50525
Exploit-DB
Proof-of-concept repositories
3 repositories, unverifiedkombat1/CVE-2021-43617aweiiy/CVE-2021-43617Sybelle03/CVE-2021-43617
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.19.8read 2026-10-23
  • NVDCVSS 2.07.5read 2026-10-23
  • NVDweakness (CWE)CWE-434read 2026-10-23
  • FIRST EPSSEPSS score20.0 %read 2026-11-03
  • PoC-in-GitHubproof of concept3read 2026-11-03
  • Exploit-DBdetectionread 2026-11-03
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-11-14
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2021-43617?

Laravel Framework through 8.70.2 does not sufficiently block the upload of executable PHP content because Illuminate/Validation/Concerns/ValidatesAttributes.php lacks a check for .phar files, which are handled as application/x-httpd-php on systems based on Debian. NOTE: this CVE Record is for Laravel Framework, and is unrelated to any reports concerning incorrectly written user applications for image upload.

Is CVE-2021-43617 actively exploited?

Active exploitation of CVE-2021-43617 has not been confirmed. Its EPSS score was 20.0% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-43617?

CVE-2021-43617 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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