Simple CMS 2.1 Non-Persistent Cross-Site Scripting via Preview Parameter
Priority MEDIUM 56CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Passive
- 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
Simple CMS 2.1 contains a non-persistent cross-site scripting vulnerability in the preview.php file's id parameter. Attackers can inject malicious script code through a GET request to execute arbitrary scripts and potentially hijack user sessions or perform phishing attacks.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00328 26th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged 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 |
|---|---|---|---|---|---|
| SimplePHPscripts | Simple CMS | 2.1 | — | No fix listed | CNA |
- Simple CMS VendorSimplePHPscripts Affected 2.1 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:simplephpscripts:simple_cms_php:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | SimplePHPscripts |
- cpe:2.3:a:simplephpscripts:simple_cms_php:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·SimplePHPscripts
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-47919
- 2026-10-03 Alias added: GHSA-p3gm-qv6r-wh7x
References
Exploit 1
Other 1
More SimplePHPscripts Simple Cms Php vulnerabilities
- TI-2021-22531 Simple CMS 2.1 SQL Injection Vulnerability via Users Module CVSS 4.0HIGH 8.6
- TI-2021-22530 Simple CMS 2.1 Persistent Cross-Site Scripting via User Input Parameters CVSS 4.0MEDIUM 5.1
Sources
- CVE-2021-47919 · CVE Program
- CVE-2021-47919 · NVD
- FIRST EPSS
- GHSA-p3gm-qv6r-wh7x · 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