CVE-2021-47870

GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS

Published Jan 21, 2026 CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics cvssV4_0

{'score': 5.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N'}

cvssV4_0

{'score': 4.8, 'vector': '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'}

Type Values Removed Values Added
CPEs cpe:2.3:a:get-simple:getsimplecms:1.1.2:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

Type Values Removed Values Added
First Time appeared Getsimple-ce
Getsimple-ce getsimple Cms
CPEs cpe:2.3:a:getsimple-ce:getsimple_cms:1.1.2:*:*:*:*:*:*:*
Vendors & Products Getsimple-ce
Getsimple-ce getsimple Cms
Type Values Removed Values Added
First Time appeared Get-simple
Get-simple getsimplecms
Vendors & Products Get-simple
Get-simple getsimplecms
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 5.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
May 12, 2026, 8:45 PM
Reserved
Jan 18, 2026, 12:35 PM
Status
Modified
Published
Jan 21, 2026, 6:16 PM
Modified
Jun 17, 2026, 4:18 AM