GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS
Priority MEDIUM 55CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00279 20th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| GetSimple CMS | My SMTP Contact Plugin | 1.1.2 | — | No fix listed | CNA |
- My SMTP Contact Plugin VendorGetSimple CMS Affected 1.1.2 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:get-simple:getsimplecms:1.1.2:*:*:*:*:*:*:* | 1.1.2 | Vulnerable | GetSimple CMS |
- cpe:2.3:a:get-simple:getsimplecms:1.1.2:*:*:*:*:*:*:* Versions 1.1.2 Vulnerable ·GetSimple CMS
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-47870
- 2026-10-03 Alias added: GHSA-xcf5-jfw6-6364
References
More GetSimple CMS Getsimplecms vulnerabilities
- TI-2023-24706 An issue in GetSimpleCMS v.3.4.0a allows a remote attacker to execute arbitrary code via… CVSS 3.1CRITICAL 9.8
- TI-2021-22474 GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE CVSS 4.0HIGH 8.5
- TI-2013-06175 GetSimple CMS 3.2.1 Authenticated RCE via Arbitrary PHP File Upload CVSS 4.0HIGH 8.7
- TI-2021-22394 GetSimple CMS My SMTP Contact Plugin 1.1.2 - PHP Code Injection CVSS 4.0HIGH 8.6
- TI-2024-10309 GetSimpleCMS profile.php cross-site request forgery CVSS 4.0MEDIUM 6.9
- TI-2023-24705 Cross Site Scripting vulnerability in GetSimpleCMS v.3.4.0a allows a remote attacker to… CVSS 3.1MEDIUM 5.4
Sources
- CVE-2021-47870 · CVE Program
- CVE-2021-47870 · NVD
- FIRST EPSS
- GHSA-xcf5-jfw6-6364 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences