VDB-350358 · CVE-2026-3903 · GCVE-0-2026-3903

Modular DS Plugin up to 2.5.1 on WordPress OAuth/SSO postConfirmOauth cross-site request forgery

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.
4.2	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Modular DS Plugin up to 2.5.1 on WordPress. This affects the function postConfirmOauth of the component OAuth/SSO. The manipulation results in cross-site request forgery. This vulnerability was named CVE-2026-3903. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Modular DS Plugin up to 2.5.1 on WordPress. It has been classified as problematic. Affected is the function postConfirmOauth of the component OAuth/SSO. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. CWE is classifying the issue as CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. This is going to have an impact on integrity. CVE summarizes:

The Modular DS: Monitor, update, and backup multiple websites plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.5.1. This is due to missing nonce validation on the postConfirmOauth() function. This makes it possible for unauthenticated attackers to disconnect the plugin's OAuth/SSO connection via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The weakness was presented by Dmitrii Ignatyev. The advisory is available at wordfence.com. This vulnerability is traded as CVE-2026-3903 since 03/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

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

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Productinfo

Type

WordPress Plugin

Name

Modular DS Plugin

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (Wordfence): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Cross-site request forgery
CWE: CWE-352 / CWE-862 / CWE-863
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

03/10/2026 CVE reserved
03/11/2026 +1 days Advisory disclosed
03/11/2026 +0 days VulDB entry created
03/17/2026 +6 days VulDB entry last update

Sourcesinfo

Advisory: wordfence.com
Researcher: Dmitrii Ignatyev
Status: Not defined

CVE: CVE-2026-3903 (🔒)
GCVE (CVE): GCVE-0-2026-3903
GCVE (VulDB): GCVE-100-350358

Entryinfo

Created: 03/11/2026 09:36
Updated: 03/17/2026 03:05
Changes: 03/11/2026 09:36 (65), 03/17/2026 03:05 (1)
Complete: 🔍
Cache ID: 216:8B9:103