What’s Vulnerable › Vulnerabilities

CVE-2021-28931

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-07 · updated 2026-06-17
• Weakness: CWE-434

Description

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.

Affected products

• forkcms/forkcms: 5.9.2

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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