CVE-2023-34448

Grav is a flat-file content management system. Prior to version 1.7.42, the patch for CVE-2022-2073, a server-side template injection vulnerability in Grav leveraging the default `filter()` function, did not block other built-in functions exposed by Twig's Core Extension that could be used to invoke arbitrary unsafe functions, thereby allowing for remote code execution. A patch in version 1.74.2 overrides the built-in Twig `map()` and `reduce()` filter functions in `system/src/Grav/Common/Twig/Extension/GravExtension.php` to validate the argument passed to the filter in `$arrow`.

• CWE-20
• CWE-1336
• CWE-94

• https://github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8Patch, Vendor Advisory
• https://github.com/getgrav/grav/security/advisories/GHSA-whr7-m3f8-mpm8Vendor Advisory
• https://github.com/twigphp/Twig/blob/v1.44.7/src/Environment.php#L148Vendor Advisory
• https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/Exploit, Patch, Third Party Advisory
• https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83Exploit, Mitigation, Vendor Advisory
• https://github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8Patch, Vendor Advisory
• https://github.com/getgrav/grav/security/advisories/GHSA-whr7-m3f8-mpm8Vendor Advisory
• https://github.com/twigphp/Twig/blob/v1.44.7/src/Environment.php#L148Vendor Advisory
• https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/Exploit, Patch, Third Party Advisory
• https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83Exploit, Mitigation, Vendor Advisory

Published

Jun 14, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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