CVE-2025-5929 The Countdown <= 2.0.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via clientId Parameter
Authenticated attackers can inject arbitrary scripts via the clientId parameter, leading to stored XSS execution on victim 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-2025-5929?
CVE-2025-5929 is a medium-severity cross-site scripting vulnerability in zourbuth The Countdown – Block Countdown Timer, published on 26 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The The Countdown plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘clientId’ parameter in all versions up to, and including, 2.0.1 due to insufficient input sanitization and output escaping. 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-2025-5929?
It affects 1 product.
Products include Zourbuth the Countdown.
How do I fix CVE-2025-5929?
No fix has been published for CVE-2025-5929 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-2025-5929 being exploited?
There is no known exploitation of CVE-2025-5929 in the wild and no public exploit code.
Sources
Also known as GHSA-p322-cgmq-h3jq.