CVEvulnerability
CVE-2021-47870
4.8 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2026-01-21
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 4.8 MEDIUM — 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
- CVSS 3.1 ([email protected])
- 5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-79
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.
Affected configurations
• get-simple getsimplecms 1.1.2
Related
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- http://get-simple.info Product
- https://github.com/GetSimpleCMS/GetSimpleCMS Product
- https://github.com/boku7/gsSMTP-Csrf2Xss2RCE/ Exploit, Third Party Advisory
- https://www.exploit-db.com/exploits/49798 Exploit, Third Party Advisory, VDB Entry
- https://www.vulncheck.com/advisories/getsimple-cms-my-smtp-contact-plugin-stored-xss Third Party Advisory