VDB-310104 · CVE-2025-31423 · GCVE-0-2025-31423

AncoraThemes Umberto Plugin up to 1.2.8 on WordPress deserialization

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in AncoraThemes Umberto Plugin up to 1.2.8 on WordPress and classified as critical. This vulnerability affects unknown code. The manipulation results in deserialization. This vulnerability is cataloged as CVE-2025-31423. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in AncoraThemes Umberto Plugin up to 1.2.8 on WordPress. Affected is an unknown code. The manipulation with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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

The weakness was shared by Tran Nguyen Bao Khanh. The advisory is shared for download at patchstack.com. This vulnerability is traded as CVE-2025-31423 since 03/28/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/23/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

WordPress Plugin

Vendor

AncoraThemes

Name

Umberto Plugin

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (Patchstack): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/28/2025 🔍
05/23/2025 +55 days 🔍
05/23/2025 +0 days 🔍
05/23/2025 +0 days 🔍

Sourcesinfo

Advisory: patchstack.com
Researcher: Tran Nguyen Bao Khanh
Status: Not defined

CVE: CVE-2025-31423 (🔍)
GCVE (CVE): GCVE-0-2025-31423
GCVE (VulDB): GCVE-100-310104

Entryinfo

Created: 05/23/2025 15:24
Changes: 05/23/2025 15:24 (63)
Complete: 🔍
Cache ID: 216::103