Multiple cross-site scripting (XSS) vulnerabilities in the Guestbook module for PHPCMS allow remote attackers to inject arbitrary web script or HTML via the (1) list or (2) introduce parameter to index.php.
Conclusion & alert: CVE-2013-5939 is rated High Exploit Risk (60.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.85%). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.60% over the last day, indicating growing attacker interest. Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.25% | 1.85% | +1.60% |
| 2 | 2025-03-30 | 0.22% | 0.25% | +0.03% |
| 3 | 2025-03-29 | — | 0.22% | — |
Full EPSS history (7 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| phpcms | guesbook_module | — | cpe:2.3:a:phpcms:guesbook_module:-:*:*:*:*:phpcms:*:* |