CVE-2026-42739 WordPress Advanced IP Blocker plugin <= 8.10.7 - Cross Site Scripting (XSS) vulnerability
A DOM-based XSS vulnerability in the Advanced IP Blocker WordPress plugin allows attackers to inject malicious scripts, potentially leading to session hijacking or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-42739?
CVE-2026-42739 is a high-severity cross-site scripting vulnerability in IniLerm Advanced IP Blocker, published on 27 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in IniLerm Advanced IP Blocker advanced-ip-blocker allows DOM-Based XSS.This issue affects Advanced IP Blocker: from n/a through <= 8.10.7.
Weakness: CWE-79
Which versions are affected by CVE-2026-42739?
How do I fix CVE-2026-42739?
No fix has been published for CVE-2026-42739 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-42739 being exploited?
There is no known exploitation of CVE-2026-42739 in the wild and no public exploit code.
Sources
Also known as GHSA-p4rc-j472-qjfr.