FKIE_CVE-2025-66299

Vulnerability from fkie_nvd - Published: 2025-12-01 22:15 - Updated: 2025-12-03 15:41
Severity ?
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
Grav is a file-based Web platform. Prior to 1.8.0-beta.27, Grav CMS is vulnerable to a Server-Side Template Injection (SSTI) that allows any authenticated user with editor permissions to execute arbitrary code on the remote server, bypassing the existing security sandbox. Since the security sandbox does not fully protect the Twig object, it is possible to interact with it (e.g., call methods, read/write attributes) through maliciously crafted Twig template directives injected into a web page. This allows an authenticated editor to add arbitrary functions to the Twig attribute system.twig.safe_filters, effectively bypassing the Grav CMS sandbox. This vulnerability is fixed in 1.8.0-beta.27.
References
security-advisories@github.comhttps://github.com/getgrav/grav/commit/e37259527d9c1deb6200f8967197a9fa587c6458Patch
security-advisories@github.comhttps://github.com/getgrav/grav/security/advisories/GHSA-gjc5-8cfh-653xExploit, Third Party Advisory
Impacted products
Vendor Product Version
getgrav grav *
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
To clipboard 

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      "value": "Grav is a file-based Web platform. Prior to 1.8.0-beta.27, Grav CMS is vulnerable to a Server-Side Template Injection (SSTI) that allows any authenticated user with editor permissions to execute arbitrary code on the remote server, bypassing the existing security sandbox. Since the security sandbox does not fully protect the Twig object, it is possible to interact with it (e.g., call methods, read/write attributes) through maliciously crafted Twig template directives injected into a web page. This allows an authenticated editor to add arbitrary functions to the Twig attribute system.twig.safe_filters, effectively bypassing the Grav CMS sandbox. This vulnerability is fixed in 1.8.0-beta.27."
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
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          "value": "CWE-94"
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          "value": "CWE-1336"
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      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.