Medium 5.4Published Jan 21, 2026

CVE-2021-47870GetSimple CMS My SMTP Contact Plugin 1.1.2 suffers from a Stored Cross-Site Scripting (XSS) vulnerability.

Updated under an hour ago (2026-10-19 09:10 UTC)

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It affects get-simple getsimplecms. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

GetSimple CMS My SMTP Contact Plugin 1.1.2 suffers from a Stored Cross-Site Scripting (XSS) vulnerability. The plugin attempts to sanitize user input using htmlspecialchars(), but this can be bypassed by passing dangerous characters as escaped hex bytes. This allows attackers to inject arbitrary client-side code that executes in the administrator's browser when visiting a malicious page.

CVSS: 5.4 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

get-simple getsimplecms get-simple:getsimplecms	1.1.2	NVD

References

http://get-simple.infoproduct
https://github.com/GetSimpleCMS/GetSimpleCMSproduct
https://github.com/boku7/gsSMTP-Csrf2Xss2RCE/exploit, third-party-advisory
https://www.exploit-db.com/exploits/49798exploit, third-party-advisory, vdb-entry
https://www.vulncheck.com/advisories/getsimple-cms-my-smtp-contact-plugin-stored-xssthird-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.