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.
| Software | From | Fixed in |
|---|---|---|
cgi
|
- | 0.3.5.1 |
|
cgi
|
0.3.6 | 0.3.6.x |
|
cgi
|
0.3.6 | 0.3.7 |
|
cgi
|
0.4.0 | 0.4.2 |
| ruby-lang / cgi | - | 0.3.5.1 |
| ruby-lang / cgi | 0.4.0 | 0.4.2 |
| ruby-lang / cgi | 0.3.6 | 0.3.6.x |
- https://github.com/ruby/cgi/pull/52
- https://github.com/ruby/cgi/pull/53
- https://github.com/ruby/cgi/pull/54
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27220.yml
- https://hackerone.com/reports/2890322
- https://lists.debian.org/debian-lts-announce/2025/03/msg00008.html
- https://www.cve.org/CVERecord?id=CVE-2025-27220
- https://www.ruby-lang.org/en/news/2025/02/26/security-advisories
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