CVE-2026-61457

The Grav API plugin (getgrav/grav-plugin-api) before 1.0.3 contains a file upload extension bypass in the API media controller. HandlesMediaUploads::validateFileExtension() inspects only the final file extension via pathinfo($filename, PATHINFO_EXTENSION), so a user with api.media.write permission can upload a file with a double extension such as shell.php.jpg to bypass the dangerous extensions blocklist. The web server may then execute the file as PHP, resulting in remote code execution.

CVSS 4.0

5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.6% chance of exploitation in the next 30 days; higher than 49% of CVEs (scores of 2026-10-25)

CWE

CWE-434

Published

2026-07-15

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

References

• https://github.com/getgrav/grav/security/advisories/GHSA-66v2-vxxf-xc3v
• https://www.vulncheck.com/advisories/grav-before-remote-code-execution-via-file-upload-extension-bypass
• https://github.com/getgrav/grav/security/advisories/GHSA-66v2-vxxf-xc3v

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