CVE-2021-47860
GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE
HIGH 8.5EPSS 0.3%
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
- GetSimple CMS · Custom JS Plugin
- CVSS v4.0 VULNCHECK
- 8.5 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v3.1 NVD
- 4.3 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - CVSS v3.1 VULNCHECK
- 5.3 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - EPSS
- 0.28% chance of exploitation in the next 30 days, 19th percentile
- Published
- 2026-01-21
- Updated
- 2026-04-07
Proof-of-concept exploits (3)
- https://www.exploit-db.com/exploits/49816
- boku7/gsCMS-CustomJS-Csrf2Xss2Rce11★ · 2023-03-08
- https://www.exploit-db.com/exploits/49712
Security advisories
- https://www.vulncheck.com/advisories/getsimple-cms-custom-js-csrf-to-xss-to-rce
- http://get-simple.info
- GetSimpleCMS/GetSimpleCMS