CVE-2024-11582

Subscribe2 – Form, Email Subscribers & Newsletters <= 10.43 - Unauthenticated Stored Cross-Site Scripting via IP Parameter

2025-02-18 15:02

Strategic Overview

Status: Patched in 10.44
Affected Plugin: Subscribe2 – Form, Email Subscribers & Newsletters
Affected Version: <= 10.43
CVSS: 7.2High
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2024-11582

View all Subscribe2 – Form, Email Subscribers & Newsletters vulnerabilities

At a glance

CVE-2024-11582 is a high-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Subscribe2 WordPress plugin, affecting versions <= 10.43. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 10.44; sites on affected versions should update now. Disclosed February 2025, reported by mikemyers.

Vulnerability Overview

The Subscribe2 – Form, Email Subscribers & Newsletters plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ip parameter in all versions up to, and including, 10.43 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

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

Reaching this weakness in Subscribe2 <= 10.43 takes no account at all. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Subscribe2 the fix is 10.44: builds <= 10.43 are affected, anything from 10.44 onward is not.

Remediation

Update to version 10.44, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Subscribe2 10.44 closes this, and updating the plugin is the step that ends it.

Firewall
Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2024-11582 https://www.wordfence.com/threat-intel/vulnerabilities/id/36777e39-be45-41f2-beca-2971e15b77cd https://nvd.nist.gov/vuln/detail/CVE-2024-11582

Related records

Same weakness class

Other vulnerabilities in Subscribe2 – Form, Email Subscribers & Newsletters

CVSS Vector

7.2

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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