CVE-2025-31423

CRITICAL 9.8

WordPress Umberto theme <= 1.2.8 - PHP Object Injection Vulnerability

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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

CWE	CWE-502
Vendor	ancorathemes
Product	umberto
Published	May 23, 2025
Last Updated	Apr 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

AncoraThemes / Umberto

0 ≤ 1.2.8

References

NVD ↗ CVE.org ↗ EPSS Data ↗

patchstack.com: https://patchstack.com/database/Wordpress/Theme/umberto/vulnerability/wordpress-umberto-1-2-8-php-object-injection-vulnerability?_s_id=cve

Credits

Tran Nguyen Bao Khanh (VCI - VNPT Cyber Immunity) | Patchstack Bug Bounty Program