CVE-2025-27220 – Apache CGI Regular Expression Denial of Service (ReDoS) Vulnerability

The following table lists the changes that have been made to the
CVE-2025-27220 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Mar. 04, 2025

    Action Type Old Value New Value
    Added Description In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method.
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
    Added CWE CWE-1333
    Added Reference https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27220.yml
    Added Reference https://hackerone.com/reports/2890322
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