CVE-2025-27220

MEDIUM
Published Mar 4, 2025 Modified Nov 3, 2025 CWE-1333

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.

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CVSS v3.1 Score

4.0
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L

Weakness Type (CWE)

CWE-1333 CWE-1333

Affected Products

Vendor Product
ruby-lang cgi
ruby-lang cgi
ruby-lang cgi
ruby-lang ruby
ruby-lang ruby

References

Frequently Asked Questions

What is CVE-2025-27220? +
In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method. It has a CVSS v3.1 base score of 4.0 (MEDIUM).
How severe is CVE-2025-27220? +
CVE-2025-27220 has a CVSS v3.1 score of 4.0 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2025-27220? +
CVE-2025-27220 affects products from ruby-lang, specifically: cgi, ruby. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-27220? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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