CVE-2026-8622 Image Sizes on Demand <= 1.3 - Reflected Cross-Site Scripting via PHP_SELF Server Variable
Unauthenticated attackers can inject scripts into admin pages via PHP_SELF, potentially leading to account takeover if an admin clicks a malicious link.
- 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-2026-8622?
CVE-2026-8622 is a medium-severity cross-site scripting vulnerability in pixelwelt Image Sizes on Demand, published on 24 Jun 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
The Image Sizes on Demand plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via PHP_SELF Server Variable in all versions up to, and including, 1.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The injected payload only executes in the context of an administrator, as the settings page requires the manage_options capability to render.
Weakness: CWE-79
Which versions are affected by CVE-2026-8622?
How do I fix CVE-2026-8622?
No fix has been published for CVE-2026-8622 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-2026-8622 being exploited?
There is no known exploitation of CVE-2026-8622 in the wild and no public exploit code.
Sources
Also known as GHSA-crf7-vj54-j76v.