CVE-2025-5540 Event RSVP and Simple Event Management Plugin <= 4.1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting
Authenticated attackers can inject arbitrary scripts via a shortcode, leading to code execution when users view affected pages.
- 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-2025-5540?
CVE-2025-5540 is a medium-severity cross-site scripting vulnerability in emarket-design Event RSVP and Simple Event Management Plugin, published on 26 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Event RSVP and Simple Event Management Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'emd_mb_meta' shortcode in all versions up to, and including, 4.1.0 due to insufficient input sanitization and output escaping on user supplied attributes. 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-2025-5540?
It affects 1 product.
Products include Emarketdesign Event Rsvp and Simple Event Management.
How do I fix CVE-2025-5540?
No fix has been published for CVE-2025-5540 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-2025-5540 being exploited?
There is no known exploitation of CVE-2025-5540 in the wild and no public exploit code.
Sources
Also known as GHSA-c9hf-xcx8-2qjx.