CVE-2023-34448

Name: CVE-2023-34448
Creator: NVD / NIST
Published: 2023-06-14T23:15:11.107+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 4.52%

Last modified Jun 17, 2026

CVE-2023-34448 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. 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. EPSS estimates a 4.52% chance of exploitation in the next 30 days.

Description

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`.

Metrics

CVSS 3.1

7.2/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

4.52%

90.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Getgrav	Grav	< 1.7.42

References

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

Timeline

Published: Jun 14, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-34448?

How severe is CVE-2023-34448?

CVE-2023-34448 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 4.52% probability of exploitation in the next 30 days.

How do I fix CVE-2023-34448?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-34448?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST