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CVE-2025-31423

WordPress Umberto theme <= 1.2.8 - PHP Object Injection Vulnerability

9.8 Critical

Deserialization of Untrusted Data vulnerability in AncoraThemes Umberto umberto allows Object Injection.This issue affects Umberto: from n/a through <= 1.2.8.

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

0.62%Up 0.6 points since May 24, 2025
90%50%10%1%

What each source reports

CVE List Score used 9.8

WordPress Umberto theme <= 1.2.8 - PHP Object Injection Vulnerability

Deserialization of Untrusted Data vulnerability in AncoraThemes Umberto umberto allows Object Injection.This issue affects Umberto: from n/a through <= 1.2.8.

Record
CVE-2025-31423
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-2025-27804 9.8

Deserialization of Untrusted Data vulnerability in AncoraThemes Umberto umberto allows Object Injection.This issue affects Umberto: from n/a through <= 1.2.8.

Record
EUVD-2025-27804
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-v4pp-gcmm-cv95 9.8

Deserialization of Untrusted Data vulnerability in AncoraThemes Umberto allows Object Injection....

Deserialization of Untrusted Data vulnerability in AncoraThemes Umberto allows Object Injection. This issue affects Umberto: from n/a through 1.2.8.

Record
GHSA-v4pp-gcmm-cv95
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 AncoraThemes Umberto umberto allows Object Injection.This issue affects Umberto: from n/a through <= 1.2.8.

Record
CVE-2025-31423
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-2025-31423 is a critical vulnerability (CVSS 9.8) in Ancorathemes Umberto, published May 23, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.62%, the 49th percentile. No source names a fixed version.

References

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