What’s Vulnerable › Vulnerabilities

CVE-2025-4595: FastSpring <= 3.0.1 - Authenticated (Contributor+) Stored Cross-Site Scripting

• 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: 2025-05-31 · updated 2026-06-17
• Weakness: CWE-79

Description

The FastSpring plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'fastspring/block-fastspringblocks-complete-product-catalog' block in all versions up to, and including, 3.0.1 due to insufficient input sanitization and output escaping on the 'color' attribute. 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

• jtewes FastSpring: through 3.0.1

References

• https://wordpress.org/plugins/fastspring/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/e96d118a-e38c-4043-9550-5f5ab0d83dc7?source=cve

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