CVE-2026-4073 pdfl.io <= 1.0.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'text' Shortcode Attribute
Authenticated attackers can inject arbitrary scripts via the text shortcode attribute, leading to stored XSS execution for other users.
- 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-2026-4073?
CVE-2026-4073 is a medium-severity cross-site scripting vulnerability in dougblackjr pdfl.io, published on 8 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The pdfl.io plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'pdflio' shortcode in all versions up to, and including, 1.0.5. This is due to insufficient input sanitization and output escaping on the 'text' shortcode attribute. The output_shortcode() function directly concatenates the user-supplied $text variable into HTML output without applying esc_html() or any other escaping function. 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-2026-4073?
How do I fix CVE-2026-4073?
No fix has been published for CVE-2026-4073 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-2026-4073 being exploited?
There is no known exploitation of CVE-2026-4073 in the wild and no public exploit code.
Sources
Also known as GHSA-285h-4g37-rqhw.