CVE-2021-47870

MEDIUM EPSS 13.6%
Published Jan 21, 20265mo ago · Modified Jun 17, 20261w ago
4.8 CVSS 4.0
Medium
Find Similar
Published Jan 21, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score
4.8
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/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
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction A
Scope X

Threat Intelligence

EPSS Exploit Probability
13.6% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 1

VendorProductVersionRange
get-simplegetsimplecms1.1.2any

References 5

  • get-simple.info http://get-simple.info
    Product
  • github.com https://github.com/GetSimpleCMS/GetSimpleCMS
    Product
  • github.com https://github.com/boku7/gsSMTP-Csrf2Xss2RCE/
    ExploitThird Party Advisory
  • exploit-db.com https://www.exploit-db.com/exploits/49798
    ExploitThird Party AdvisoryVDB Entry
  • vulncheck.com https://www.vulncheck.com/advisories/getsimple-cms-my-smtp-contact-plugin-stored-xss
    Third Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.