CVE-2026-35584: CWE-306: Missing Authentication for Critical Function in freescout-help-desk freescout
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.212, the endpoint GET /thread/read/{conversation_id}/{thread_id} does not require authentication and does not validate whether the given thread_id belongs to the given conversation_id. This allows any unauthenticated attacker to mark any thread as read by passing arbitrary IDs, enumerate valid thread IDs via HTTP response codes (200 vs 404), and manipulate opened_at timestamps across conversations (IDOR). This vulnerability is fixed in 1.8.212.
AI Analysis
Technical Summary
CVE-2026-35584 affects FreeScout help desk software versions before 1.8.212. The issue is a missing authentication check on the GET /thread/read/{conversation_id}/{thread_id} endpoint, combined with improper validation of thread ownership. This permits unauthenticated attackers to mark any thread as read by supplying arbitrary conversation and thread IDs, enumerate valid thread IDs based on HTTP response codes, and manipulate the opened_at timestamps of threads across conversations, constituting an Insecure Direct Object Reference (IDOR) vulnerability. The flaw is resolved in FreeScout version 1.8.212.
Potential Impact
An unauthenticated attacker can mark any thread as read, enumerate valid thread IDs, and alter timestamps on threads without authorization. This could lead to unauthorized data manipulation and information disclosure about valid thread IDs. However, there is no indication of remote code execution or data exfiltration beyond these actions. The vulnerability has a CVSS 4.0 score of 6.9, reflecting a medium severity impact.
Mitigation Recommendations
Upgrade FreeScout to version 1.8.212 or later, where this vulnerability is fixed. Since the vendor advisory confirms the fix in 1.8.212, applying this official update is the recommended remediation. No other mitigation steps are indicated or necessary.
CVE-2026-35584: CWE-306: Missing Authentication for Critical Function in freescout-help-desk freescout
Description
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.212, the endpoint GET /thread/read/{conversation_id}/{thread_id} does not require authentication and does not validate whether the given thread_id belongs to the given conversation_id. This allows any unauthenticated attacker to mark any thread as read by passing arbitrary IDs, enumerate valid thread IDs via HTTP response codes (200 vs 404), and manipulate opened_at timestamps across conversations (IDOR). This vulnerability is fixed in 1.8.212.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-35584 affects FreeScout help desk software versions before 1.8.212. The issue is a missing authentication check on the GET /thread/read/{conversation_id}/{thread_id} endpoint, combined with improper validation of thread ownership. This permits unauthenticated attackers to mark any thread as read by supplying arbitrary conversation and thread IDs, enumerate valid thread IDs based on HTTP response codes, and manipulate the opened_at timestamps of threads across conversations, constituting an Insecure Direct Object Reference (IDOR) vulnerability. The flaw is resolved in FreeScout version 1.8.212.
Potential Impact
An unauthenticated attacker can mark any thread as read, enumerate valid thread IDs, and alter timestamps on threads without authorization. This could lead to unauthorized data manipulation and information disclosure about valid thread IDs. However, there is no indication of remote code execution or data exfiltration beyond these actions. The vulnerability has a CVSS 4.0 score of 6.9, reflecting a medium severity impact.
Mitigation Recommendations
Upgrade FreeScout to version 1.8.212 or later, where this vulnerability is fixed. Since the vendor advisory confirms the fix in 1.8.212, applying this official update is the recommended remediation. No other mitigation steps are indicated or necessary.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-03T20:09:02.827Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d5314faaed68159a33992b
Added to database: 4/7/2026, 4:31:11 PM
Last enriched: 4/7/2026, 4:46:45 PM
Last updated: 4/8/2026, 12:46:37 AM
Views: 9
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