Improper Neutralization of Special Elements Used in a Template Engine Affecting getgrav/grav package, versions <1.8.0-beta.27
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-GETGRAVGRAV-14157172
- published2 Dec 2025
- disclosed1 Dec 2025
- creditp1r0x
Introduced: 1 Dec 2025
NewCVE-2025-66297 (opens in a new tab)How to fix?
Upgrade getgrav/grav to version 1.8.0-beta.27 or higher.
Overview
getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS.
Affected versions of this package are vulnerable to Improper Neutralization of Special Elements Used in a Template Engine via the Twig processing feature enabled through page frontmatter. An attacker can gain elevated privileges or execute arbitrary system commands by injecting malicious Twig expressions via the scheduler API.