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    CVE-2026-93871

    Cotonti through 1.0.0 fails to validate redirect destinations in page bodies prefixed with redir:, allowing authenticated users with page creation or edit permissions to store redirects to arbitrary external hosts. Attackers can craft pages on trusted domains that redirect visitors to malicious sites for phishing attacks without administrative privileges.

    Published:Sep 18, 2026
    Last Modified:Sep 21, 2026
    EPS:Sep 18, 2026
    EPSS Score:0.00167
    CVSS Score:5.4

    Affected Products

    Vendor
    Cotonti
    Product
    Cotonti
    Vendor
    Cotonti
    Product
    Cotonti Siena
    Vendor
    Cotonti
    Product
    Siena

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-178 Cross-Site Flashing

    Related CVEs

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    CVE-2026-100521 (CVSS 5.1) — Cotonti through 1.0.0 contains a reflected cross-site scripting vulnerability in the search plugin highlight p…
    CVE-2026-93873 (CVSS 5.3) — Cotonti through 1.0.0 fails to validate anti-CSRF tokens in the contact plugin submission handler, allowing at…
    CVE-2026-93872 (CVSS 7.7) — Cotonti 1.0.0 passes the base64-decoded cb parameter to unserialize() without allowed_classes restriction in t…
    CVE-2026-93869 (CVSS 5.3) — Cotonti through 1.0.0 contains an open redirect vulnerability in the cot_url_check() function that validates r…
    CVE-2026-93868 (CVSS 9.2) — Cotonti through 1.0.0 derives password recovery validation tokens from md5(microtime()) in users.passrecover.p…
    CVE-2026-91939 (CVSS 9.3) — Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize() without allowed_classes restriction…
    CVE-2026-71294 (CVSS 7.6) — Cotonti CMS's Comments plugin deserializes user-supplied data without restricting the classes that may be inst…
    CVE-2026-58144 (CVSS 5.1) — Cotonti Siena 0.9.26 and earlier contains a stored cross-site scripting vulnerability that allows authenticate…

    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