CVE-2021-47860

Name: CVE-2021-47860
Creator: NVD / NIST
Published: 2026-01-21T18:16:17.1+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.5/10EPSS 0.23%

Last modified Jun 17, 2026

CVE-2021-47860 is a high-severity vulnerability rated 8.5/10 on the CVSS scale. 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.. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

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

CVSS 4.0

8.5/10

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

EPSS Probability

0.23%

13.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Get-Simple	Getsimplecms	0.1

References

http://get-simple.infoProduct
https://github.com/GetSimpleCMS/GetSimpleCMSProduct
https://github.com/boku7/gsCMS-CustomJS-Csrf2Xss2RceExploit, Third Party Advisory
https://www.exploit-db.com/exploits/49712Exploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/49816Exploit, Third Party Advisory, VDB Entry
https://www.vulncheck.com/advisories/getsimple-cms-custom-js-csrf-to-xss-to-rceThird Party Advisory

Timeline

Published: Jan 21, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-47860?

How severe is CVE-2021-47860?

CVE-2021-47860 has a CVSS score of 8.5/10 (HIGH severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.

How do I fix CVE-2021-47860?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-47860?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST