CVE-2026-8698 Cross-site scripting in Cryptocurrency Prijsvergelijking Widget
Authenticated attackers can inject arbitrary scripts via shortcode attributes, leading to stored XSS execution for site visitors.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8698?
CVE-2026-8698 is a medium-severity cross-site scripting vulnerability in cryptoprijzen Cryptocurrency Prijsvergelijking Widget, published on 27 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Cryptocurrency Prijsvergelijking Widget plugin for WordPress is vulnerable to Stored Cross-Site Scripting in version 1.0. This is due to insufficient output escaping in the as_get_coin_shortcode() function, which renders the 'width' (and 'height') shortcode attribute directly into the style attribute of an <iframe> element without applying any escaping function such as esc_attr(). An attacker-controlled value like '100px;"onload="alert(1)" x="' terminates the style attribute prematurely and injects an arbitrary HTML attribute into the iframe tag. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2026-8698?
How do I fix CVE-2026-8698?
No fix has been published for CVE-2026-8698 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-2026-8698 being exploited?
There is no known exploitation of CVE-2026-8698 in the wild and no public exploit code.
Sources
Also known as GHSA-3r7w-pvvh-cggq.