CVE-2026-34890 PUBLISHED

WordPress MSTW League Manager plugin <= 2.10 - Cross Site Scripting (XSS) vulnerability

Assigner: Patchstack
Reserved: 31.03.2026 Published: 02.04.2026 Updated: 02.04.2026

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Mark O’Donnell MSTW League Manager allows DOM-Based XSS.This issue affects MSTW League Manager: from n/a through 2.10.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
CVSS Score: 6.5

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	Low	Integrity Impact	Low
User Interaction	Required	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	Mark O’Donnell
Product	MSTW League Manager
Versions	Default: unaffected affected from n/a to 2.10 (incl.)

Credits

Conor Sullivan | Patchstack Bug Bounty Program finder

References

https://patchstack.com/database/wordpress/plugin/mstw-league-manager/vulnerability/wordpress-mstw-league-manager-plugin-2-10-cross-site-scripting-xss-vulnerability?_s_id=cve

Problem Types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE

Impacts

CAPEC-588 DOM-Based XSS