Description
Grav before 2.0.4 contains a regular expression denial of service (ReDoS) vulnerability in the regex_replace filter and function, which are allowlisted in the Twig content sandbox. When Twig processing in page content is enabled (security.twig_content.process_enabled: true, disabled by default), an authenticated page editor can supply a catastrophically backtracking PCRE pattern that is passed directly to PHP's preg_replace(), causing unbounded CPU consumption and denial of service to the web server process.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| getgrav | grav | < 2.0.4 | 2.0.4 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | getgrav/grav | < 2.0.4 | 2.0.4 | GHSA-37f3-6p89-6qr9 |
References
- GitHub Security Advisory (GHSA-37f3-6p89-6qr9) vendor-advisory
- VulnCheck Advisory: Grav < 2.0.4 ReDoS via regex_replace in Sandbox third-party-advisory