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Vulnerability record · public intelligence
CVE-2021-47870
MEDIUM

GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS

Published Jan 21, 2026 · Updated Oct 23, 2026

Severity · CVSSMEDIUM · 5.4
Known exploitationNot listed
EPSS / likelihood0.28%
QFinch risk scoreNot available

Original summary

Normalized public record · Updated Oct 23, 2026

GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

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.

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

CVENVDEPSS
SSVC priority
LOW
Confidence
Not available
Aliases
None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. GitHub advisory ↗
  2. Vendor Homepage ↗
  3. Source repository ↗
  4. ExploitDB-49798 ↗
  5. VulnCheck Advisory: GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS ↗

Record history

Published Jan 21, 2026 · Last refreshed Oct 23, 2026