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    CVE-2025-52892

    EspoCRM is a web application with a frontend designed as a single-page application and a REST API backend written in PHP. In versions 9.1.6 and below, if a user loads Espo in the browser with double slashes (e.g https://domain//#Admin) and the webserver does not strip the double slash, it can cause a corrupted Slim router's cache. This will make the instance unusable until there is a completed rebuild. This is fixed in version 9.1.7.

    Published:Aug 5, 2025
    Last Modified:Sep 11, 2025
    EPS:Aug 5, 2025
    EPSS Score:0.00038
    CVSS Score:4.5

    Affected Products

    Vendor
    Espocrm
    Product
    Espocrm

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-273 HTTP Response Smuggling
    CAPEC-33 HTTP Request Smuggling

    Related CVEs

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    CVE-2026-41160 (CVSS 4.3) — EspoCRM is an open source customer relationship management application. Prior to 9.3.5, a business logic flaw …
    CVE-2026-33741 (CVSS 6.8) — EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below allow authent…
    CVE-2026-33733 (CVSS 7.2) — EspoCRM is an open source customer relationship management application. Prior to version 9.3.4, the admin temp…
    CVE-2026-33656 (CVSS 9.1) — EspoCRM is an open source customer relationship management application. Prior to version 9.3.4, EspoCRM's buil…
    CVE-2026-33740 (CVSS 5.4) — EspoCRM is an open source customer relationship management application. In versions 9.3.3 and below, the POST …
    CVE-2026-33659 (CVSS 3.5) — EspoCRM is an open source customer relationship management application. In versions 9.3.3 and below, the POST …
    CVE-2026-33657 (CVSS 4.6) — EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below have a stored…
    CVE-2026-33534 (CVSS 4.3) — EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below have an authe…

    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