CVE-2025-4126 EG-Series <= 2.1.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
Authenticated attackers can inject arbitrary JavaScript via shortcode attributes, leading to stored XSS execution on affected WordPress sites.
- 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-2025-4126?
CVE-2025-4126 is a medium-severity cross-site scripting vulnerability in emmanuelg EG-Series, published on 15 May 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The EG-Series plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's [series] shortcode in all versions up to, and including, 2.1.1 due to insufficient input sanitization and output escaping on user supplied attributes in the shortcode_title function. This makes it possible for authenticated attackers - with contributor-level access and above, on sites with the Classic Editor plugin activated - to inject arbitrary JavaScript code in the titletag attribute that will execute whenever a user access an injected page.
Weakness: CWE-80
Which versions are affected by CVE-2025-4126?
How do I fix CVE-2025-4126?
No fix has been published for CVE-2025-4126 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-2025-4126 being exploited?
There is no known exploitation of CVE-2025-4126 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-47qp-9grv-hjc7.