WordPress Grand Conference theme <= 5.3 - PHP Object Injection vulnerability
Priority MEDIUM 49CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.
Summary
Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Conference grandconference allows Object Injection.This issue affects Grand Conference: from n/a through <= 5.3.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00485 42nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| ThemeGoods | Grand Conference | up to 5.3 | — | No fix listed | CNA |
- Grand Conference VendorThemeGoods Affected up to 5.3 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:themegoods:grand_conference:*:*:*:*:*:wordpress:*:* | up to 5.3 | Vulnerable | ThemeGoods |
- cpe:2.3:a:themegoods:grand_conference:*:*:*:*:*:wordpress:*:* Versions up to 5.3 Vulnerable ·ThemeGoods
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-39354
- 2026-10-03 Alias added: GHSA-p5p2-m2mh-3r9v
More ThemeGoods Grand Conference vulnerabilities
- TI-2025-37482 WordPress Grand Conference Theme Custom Post Type plugin < 2.6.4 - Broken Access Control vulnerability CVSS 3.1HIGH 8.8
- TI-2025-39667 WordPress Grand Conference Theme Custom Post Type plugin < 2.6.4 - Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
Sources
- CVE-2025-39354 · CVE Program
- CVE-2025-39354 · NVD
- FIRST EPSS
- GHSA-p5p2-m2mh-3r9v · GitHub Advisory Database · CC BY 4.0
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