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CVE-2025-39354

WordPress Grand Conference theme <= 5.3 - PHP Object Injection vulnerability

9.8 Critical

Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Conference grandconference allows Object Injection.This issue affects Grand Conference: from n/a through <= 5.3.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.48%Up 0.4 points since May 20, 2025
90%50%10%1%

What each source reports

CVE List Score used 9.8

WordPress Grand Conference theme <= 5.3 - PHP Object Injection vulnerability

Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Conference grandconference allows Object Injection.This issue affects Grand Conference: from n/a through <= 5.3.

Record
CVE-2025-39354
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
EUVDEUVD-2025-15781 9.8

Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Conference grandconference allows Object Injection.This issue affects Grand Conference: from n/a through <= 5.3.

Record
EUVD-2025-15781
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-p5p2-m2mh-3r9v 9.8

Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Conference allows Object...

Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Conference allows Object Injection.This issue affects Grand Conference: from n/a through 5.2.

Record
GHSA-p5p2-m2mh-3r9v
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
NVD 9.8

Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Conference grandconference allows Object Injection.This issue affects Grand Conference: from n/a through <= 5.3.

Record
CVE-2025-39354
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02

Affected products

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-39354 is a critical vulnerability (CVSS 9.8) in Themegoods Grand Conference, published May 19, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 42nd percentile. No source names a fixed version.

References

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