CVE-2026-33559 Cross-site scripting in OpenStreetMap
A logged-in user with page editing privileges can inject malicious scripts via crafted requests, leading to script execution in victims' browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-33559?
CVE-2026-33559 is a medium-severity cross-site scripting vulnerability in MiKa OpenStreetMap, published on 27 Mar 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
WordPress Plugin "OpenStreetMap" provided by MiKa contains a cross-site scripting vulnerability. On the site with the affected version of the plugin enabled, a logged-in user with a page-creating/editing privilege can embed some malicious script with a crafted HTTP request. When a victim user accesses this page, the script may be executed in the user's web browser.
Weakness: CWE-79
Which versions are affected by CVE-2026-33559?
How do I fix CVE-2026-33559?
No fix has been published for CVE-2026-33559 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-2026-33559 being exploited?
There is no known exploitation of CVE-2026-33559 in the wild and no public exploit code.
Sources
Also known as GHSA-fgh4-4rfj-927q.