What’s Vulnerable › Vulnerabilities

CVE-2021-27520

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-03-19 · updated 2026-06-17
• Weakness: CWE-79

Description

A cross-site scripting (XSS) issue in FUDForum 3.1.0 allows remote attackers to inject JavaScript via index.php in the "author" parameter.

Affected products

• Fudforum: 3.1.0

References

• http://packetstormsecurity.com/files/162942/FUDForum-3.1.0-Cross-Site-Scripting.html
• https://github.com/fudforum/FUDforum/issues/2
• http://packetstormsecurity.com/files/162942/FUDForum-3.1.0-Cross-Site-Scripting.html
• https://github.com/fudforum/FUDforum/issues/2

Get alerted when CVE-2021-27520 or the next vulnerability affects your stack