What’s Vulnerable › Vulnerabilities

CVE-2018-6354

• Severity: medium (CVSS 6.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-01-27 · updated 2026-06-17
• Weakness: CWE-79

Description

templates/forms/thanks.html in Formspree before 2018-01-23 allows XSS related to the _next parameter.

Affected products

• Formspree: before 2018-01-23 — fixed in 2018-01-23

How to fix

Upgrade to a fixed version: Formspree 2018-01-23. Check the vendor advisory for mitigations.

References

• https://github.com/formspree/formspree/commit/5f18eeaaa459bee9a58f70cdf7c46adb1ef34ea7
• https://github.com/formspree/formspree/commit/5f18eeaaa459bee9a58f70cdf7c46adb1ef34ea7

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