What’s Vulnerable › Vulnerabilities

CVE-2025-13963: FX Currency Converter <= 0.2.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-12 · updated 2026-10-07
• Weakness: CWE-79

Description

The FX Currency Converter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'fxcc_convert' shortcode in all versions up to, and including, 0.2.0 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.

Affected products

• falselight FX Currency Converter: through 0.2.0

References

• https://plugins.trac.wordpress.org/browser/fx-currency-converter/tags/0.2.0/includes/shortcode.php#L57
• https://plugins.trac.wordpress.org/browser/fx-currency-converter/trunk/includes/shortcode.php#L57
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3415819%40fx-currency-converter&new=3415819%40fx-currency-converter&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/d01a7887-afd7-418b-99ad-92157582a506?source=cve

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