VDB-322927 · CVE-2025-49401 · GCVE-0-2025-49401

ExpressTech Systems Quiz and Survey Master Plugin up to 10.2.5 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 has been found in ExpressTech Systems Quiz and Survey Master Plugin up to 10.2.5 on WordPress and classified as critical. Affected by this vulnerability is an unknown functionality. This manipulation causes deserialization. This vulnerability is tracked as CVE-2025-49401. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in ExpressTech Systems Quiz and Survey Master Plugin up to 10.2.5 on WordPress. It has been declared as critical. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Deserialization of Untrusted Data vulnerability in ExpressTech Systems Quiz And Survey Master allows Object Injection. This issue affects Quiz And Survey Master: from n/a through 10.2.5.

The weakness was disclosed by Phat Rio. It is possible to read the advisory at patchstack.com. This vulnerability is known as CVE-2025-49401 since 06/04/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/05/2025).

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Survey Software

Vendor

ExpressTech Systems

Name

Quiz and Survey Master 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

06/04/2025 CVE reserved
09/05/2025 +93 days Advisory disclosed
09/05/2025 +0 days VulDB entry created
09/05/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: patchstack.com
Researcher: Phat Rio
Status: Not defined

CVE: CVE-2025-49401 (🔒)
GCVE (CVE): GCVE-0-2025-49401
GCVE (VulDB): GCVE-100-322927

Entryinfo

Created: 09/05/2025 22:03
Changes: 09/05/2025 22:03 (63)
Complete: 🔍
Cache ID: 216::103