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    CVE-2026-35584

    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.

    Published:Apr 7, 2026
    Last Modified:Apr 16, 2026
    EPS:Apr 7, 2026
    EPSS Score:0.00072
    CVSS Score:6.5

    Affected Products

    Vendor
    Freescout
    Product
    Freescout
    Vendor
    Freescout Helpdesk
    Product
    Freescout

    Exploits

    https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-873c-r7v5-g98vhttps://github.com/freescout-help-desk/freescout/security/advisories/GHSA-873c-r7v5-g98vhttps://github.com/Spoo1k/CVE-2026-35584

    Related CVEs

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    CVE-2026-34443 (CVSS 6.9) — FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.211, c…
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    CVE-2026-32753 (CVSS 8.5) — FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. In versions 1.8.208 and bel…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High