Vulnerability · Published Jan 21, 2026 · Assigned by VulnCheck

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

Medium 5.3

In plain English

A medium-severity cross-site request forgery in Custom JS Plugin from GetSimple CMS. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 79.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
GetSimple CMS	Custom JS Plugin	0.1

Weakness: CWE-352 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

ExploitDB-49816 exploit
Vendor Homepage product
GetSimple CMS GitHub Repository product
Researcher Disclosure technical-description, exploit
ExploitDB-49712 exploit
VulnCheck Advisory: GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE third-party-advisory