CVE-2021-28931

8.8 highEPSS 1.2%

High (8.8) in fork-cms fork cms. EPSS 1.2% chance of exploitation in the next 30 days.

Arbitrary file upload vulnerability in Fork CMS 5.9.2 allows attackers to create or replace arbitrary files in the /themes directory via a crafted zip file uploaded to the Themes panel.

Severity

CVSS 3.1

8.8 high

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

EPSS: 1.2% chance of exploitation in the next 30 days; higher than 68% of CVEs (scores of 2026-10-31)
CWE: CWE-434
Published: 2021-07-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

fork-cms:fork_cms

References

https://github.com/bousalman/ForkCMS-arbitrary-upload/blob/main/README.md
https://github.com/forkcms/forkcms/releases/tag/5.9.2
https://github.com/bousalman/ForkCMS-arbitrary-upload/blob/main/README.md
https://github.com/forkcms/forkcms/releases/tag/5.9.2

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