Medium 5.3Published Jan 21, 2026

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

Updated under an hour ago (Oct 29, 2026, 1:50 AM ET)

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It affects GetSimple CMS Custom JS Plugin and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for GetSimple CMS Custom JS Plugin

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-352
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Apr 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

GetSimple CMS Custom JS Plugin getsimple_cms:custom_js_plugin (from the name)	0.1	CNA record
get-simple getsimplecms get-simple:getsimplecms	0.1	NVD

References

References

https://www.exploit-db.com/exploits/49816	exploit, third-party-advisory, vdb-entry
http://get-simple.info	product
https://github.com/GetSimpleCMS/GetSimpleCMS	product
https://github.com/boku7/gsCMS-CustomJS-Csrf2Xss2Rce	technical-description, exploit, third-party-advisory
https://www.exploit-db.com/exploits/49712	exploit, third-party-advisory, vdb-entry
https://www.vulncheck.com/advisories/getsimple-cms-custom-js-csrf-to-xss-to-rce	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.