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Fencer Vulns
high 8.8

CVE-2026-27636 json

FreeScout: Missing .htaccess in Restricted File Extensions Allows Remote Code Execution on Apache

published 2026-02-25 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-8612

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
1
Metasploit

Summary

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's file upload restriction list in `app/Misc/Helper.php` does not include `.htaccess` or `.user.ini` files. On Apache servers with `AllowOverride All` (a common configuration), an authenticated user can upload a `.htaccess` file to redefine how files are processed, enabling Remote Code Execution. This vulnerability can be exploited on its own or in combination with CVE-2026-27637. Version 1.8.206 fixes both vulnerabilities.

Patch / fix

  • freescout freescout 1.8.206

Timeline

  1. Published
  2. First public exploit (Metasploit exploit/multi/http/freescout_htaccess_rce)

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
8 mo ago

Exploit prediction

2.22% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Metasploit exploit/multi/http/freescout_htaccess_rce FreeScout Unauthenticated RCE via ZWSP .htaccess Bypass metasploit exploit, excellent rank, 2026-03-01
  • github.com https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • freescout-help-desk freescout

Classification

Weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type

References

Sources

Fencer Vulns 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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.