What’s Vulnerable › Vulnerabilities

CVE-2016-11020

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-25 · updated 2026-06-17
• Weakness: CWE-434

Description

Kunena before 5.0.4 does not restrict avatar file extensions to gif, jpeg, jpg, and png. This can lead to XSS and remote code execution.

Affected products

• Kunena: before 5.0.4 — fixed in 5.0.4

How to fix

Upgrade to a fixed version: Kunena 5.0.4. Check the vendor advisory for mitigations.

References

• https://github.com/Kunena/Kunena-Forum/pull/5028
• https://www.kunena.org/blog/179-kunena-5-0-4-released
• https://www.kunena.org/bugs/changelog
• https://github.com/Kunena/Kunena-Forum/pull/5028
• https://www.kunena.org/blog/179-kunena-5-0-4-released
• https://www.kunena.org/bugs/changelog

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