CVE-2026-34443: CWE-918: Server-Side Request Forgery (SSRF) in freescout-help-desk freescout
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.211, checkIpByMask() in app/Misc/Helper.php checks whether the input IP contains a / character. Plain IP addresses never contain /, so the function always returns false without checking any CIDR ranges. The entire 10.0.0.0/8 and 172.16.0.0/12 private ranges are unprotected. This issue has been patched in version 1.8.211.
AI Analysis
Technical Summary
FreeScout, a PHP Laravel-based help desk application, had a vulnerability in the checkIpByMask() function within app/Misc/Helper.php. This function incorrectly handles IP validation by returning false whenever an IP address contains a '/' character, which is used in CIDR notation. As a result, the private IP ranges 10.0.0.0/8 and 172.16.0.0/12 were not properly checked or protected, enabling SSRF attacks. The issue was addressed and fixed in version 1.8.211 of FreeScout.
Potential Impact
An attacker exploiting this SSRF vulnerability could cause the FreeScout server to make unauthorized requests to internal network addresses within the specified private IP ranges. This could lead to unauthorized access to internal services or information disclosure. The CVSS 4.0 score is 6.9, indicating a medium severity impact with network attack vector, low complexity, and no privileges or user interaction required.
Mitigation Recommendations
This vulnerability is patched in FreeScout version 1.8.211. Users should upgrade to version 1.8.211 or later to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-34443: CWE-918: Server-Side Request Forgery (SSRF) in freescout-help-desk freescout
Description
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.211, checkIpByMask() in app/Misc/Helper.php checks whether the input IP contains a / character. Plain IP addresses never contain /, so the function always returns false without checking any CIDR ranges. The entire 10.0.0.0/8 and 172.16.0.0/12 private ranges are unprotected. This issue has been patched in version 1.8.211.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
FreeScout, a PHP Laravel-based help desk application, had a vulnerability in the checkIpByMask() function within app/Misc/Helper.php. This function incorrectly handles IP validation by returning false whenever an IP address contains a '/' character, which is used in CIDR notation. As a result, the private IP ranges 10.0.0.0/8 and 172.16.0.0/12 were not properly checked or protected, enabling SSRF attacks. The issue was addressed and fixed in version 1.8.211 of FreeScout.
Potential Impact
An attacker exploiting this SSRF vulnerability could cause the FreeScout server to make unauthorized requests to internal network addresses within the specified private IP ranges. This could lead to unauthorized access to internal services or information disclosure. The CVSS 4.0 score is 6.9, indicating a medium severity impact with network attack vector, low complexity, and no privileges or user interaction required.
Mitigation Recommendations
This vulnerability is patched in FreeScout version 1.8.211. Users should upgrade to version 1.8.211 or later to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-27T18:18:14.894Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69cc3ec9e6bfc5ba1d43dab8
Added to database: 3/31/2026, 9:38:17 PM
Last enriched: 4/8/2026, 12:06:58 AM
Last updated: 5/16/2026, 8:00:00 AM
Views: 56
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