CVE-2026-89193 Robin Image Optimizer 2.0.0 - 2.0.7 - Unauthenticated Stored XSS via WebP URL Delivery HTML Parser
Unauthenticated attackers can inject malicious scripts via WebP URLs in Robin Image Optimizer when non-default delivery modes are active, affecting all viewers.
- 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-2026-89193?
CVE-2026-89193 is a high-severity cross-site scripting vulnerability in Unknown Robin Image Optimizer, published on 30 Sep 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 Robin Image Optimizer WordPress plugin before 2.0.8 does not escape values that its bundled HTML parser re-emits into element attributes when a non-default image delivery mode is enabled, allowing unauthenticated users to submit content that is stored and later executed as Cross-Site Scripting in the browser of any user viewing an affected page, including administrators.
Weakness: CWE-79
Which versions are affected by CVE-2026-89193?
How do I fix CVE-2026-89193?
No fix has been published for CVE-2026-89193 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-2026-89193 being exploited?
There is no known exploitation of CVE-2026-89193 in the wild and no public exploit code.
Sources
Also known as GHSA-m6mf-gjhq-c3xv.