CVE-2025-3581

MEDIUM

Newsletter < 8.8.5 - Authenticated Stored Cross-Site Scripting via Widget Options

Title source: llm

Description

The Newsletter WordPress plugin before 8.8.5 does not validate and escape some of its Widget options before outputting them back in a page/post where the block is embed, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

References (1)

Core 1

Core References

Exploit, Third Party Advisory exploit vdb-entry technical-description

https://wpscan.com/vulnerability/2d96f018-510d-40ab-9e73-76fa44784813/

Scores

CVSS v3 4.8

EPSS 0.0022

EPSS Percentile 12.4%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (1)

thenewsletterplugin/newsletter < 8.8.5

Published Jun 09, 2025

Tracked Since Feb 18, 2026