VulnerabilityModified
CVE-2021-47870
GetSimple CMS My SMTP Contact Plugin 1.1.2 suffers from a Stored Cross-Site Scripting (XSS) vulnerability.
MEDIUM 4.8EPSS 0.24%
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
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 4.0
- 4.8 MEDIUMCVSS: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/M
- EPSS
- 0.24% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- get-simple/getsimplecms
- Source
- disclosure@vulncheck.com
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.