---
id: "CVE-2026-125440"
page: "https://infrastack.ai/live/CVE-2026-125440"
kind: "vulnerability"
aliases: ["CVE-2026-125440"]
title: "s2Member WordPress plugin: stored XSS lets attackers inject script into pages"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["other", "s2member", "wordpress"]
not_affected_if: ["plugin-not-installed"]
published_at: "2026-11-13T15:17:39+00:00"
first_seen_at: "2026-11-13T15:46:17+00:00"
updated_at: "2026-11-13T15:49:06+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-125440", "first_seen_at": "2026-11-13T15:46:17+00:00"}]
exploit_sources: []
---

# s2Member WordPress plugin: stored XSS lets attackers inject script into pages

Link for people: https://infrastack.ai/live/CVE-2026-125440 (this .md is for agents)

The s2Member plugin for WordPress fails to neutralize script-related HTML tags on a web page, which is a cross-site scripting flaw. An attacker can get malicious script to run in a visitor's browser, which can expose that visitor's session or data.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether the s2Member plugin is installed on the WordPress site and note its version
- Compare the installed version against the affected range: all versions through `261106`

## Timeline

- 2026-11-13T15:46:17+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-125440

## From the sources

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Cristián Lávaque s2Member s2member allows Code Injection.This issue affects s2Member: from n/a through 261106.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_