What’s Vulnerable › Vulnerabilities

CVE-2021-47860: GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-21 · updated 2026-06-17
• Weakness: CWE-352

Description

GetSimple CMS Custom JS 0.1 plugin contains a cross-site request forgery vulnerability that allows unauthenticated attackers to inject arbitrary client-side code into administrator browsers. Attackers can craft a malicious website that triggers a cross-site scripting payload to execute remote code on the hosting server when an authenticated administrator visits the page.

Affected products

• GetSimpleCMS: 0.1

References

• http://get-simple.info
• https://github.com/GetSimpleCMS/GetSimpleCMS
• https://github.com/boku7/gsCMS-CustomJS-Csrf2Xss2Rce
• https://www.exploit-db.com/exploits/49712
• https://www.exploit-db.com/exploits/49816
• https://www.vulncheck.com/advisories/getsimple-cms-custom-js-csrf-to-xss-to-rce

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