CVE-2026-4073
MediumVulnerability 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.
CVSS Metrics
Common Vulnerability Scoring System
Vector String:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
References & Resources
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https://plugins.trac.wordpress.org/browser/pdfl-io/tags/1.0.5/pdflio.php#L117security@wordfence.com
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https://plugins.trac.wordpress.org/browser/pdfl-io/tags/1.0.5/pdflio.php#L81security@wordfence.com
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https://plugins.trac.wordpress.org/browser/pdfl-io/trunk/pdflio.php#L117security@wordfence.com
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https://plugins.trac.wordpress.org/browser/pdfl-io/trunk/pdflio.php#L81security@wordfence.com
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https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3492458%40pdfl-io&new=3492458%40pdfl-iosecurity@wordfence.com
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https://www.wordfence.com/threat-intel/vulnerabilities/id/2bf70203-61c0-406a-9110-b60761b4a513?source=cvesecurity@wordfence.com
Severity Details
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- Description
- The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
- Exploit Likelihood
- High
- Typical Severity
- Medium
- OWASP Top 10
- A03:2021-Injection
- Abstraction Level
- Base
Key Information
- Published Date
- April 08, 2026
