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    CVE-2019-25043

    ModSecurity 3.x before 3.0.4 mishandles key-value pair parsing, as demonstrated by a "string index out of range" error and worker-process crash for a "Cookie: =abc" header.

    Published:May 6, 2021
    Last Modified:Jul 3, 2025
    EPS:May 6, 2021
    EPSS Score:0.00382
    CVSS Score:5.3

    Affected Products

    Vendor
    Owasp
    Product
    Modsecurity

    Exploits

    https://github.com/SpiderLabs/ModSecurity/issues/2566https://github.com/SpiderLabs/ModSecurity/issues/2566

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2025-48866 (CVSS 7.5) — ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx.…
    CVE-2024-1019 (CVSS 8.6) — ModSecurity / libModSecurity 3.0.0 to 3.0.11 is affected by a WAF bypass for path-based payloads submitted via…
    CVE-2023-38285 (CVSS 7.5) — Trustwave ModSecurity 3.x before 3.0.10 has Inefficient Algorithmic Complexity.…
    CVE-2023-28882 (CVSS 7.5) — Trustwave ModSecurity 3.0.5 through 3.0.8 before 3.0.9 allows a denial of service (worker crash and unresponsi…
    CVE-2022-48279 (CVSS 7.5) — In ModSecurity before 2.9.6 and 3.x before 3.0.8, HTTP multipart requests were incorrectly parsed and could by…
    CVE-2021-42717 (CVSS 7.5) — ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting te…
    CVE-2020-15598 (CVSS 7.5) — Trustwave ModSecurity 3.x through 3.0.4 allows denial of service via a special request. NOTE: The discoverer r…

    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