PatchTheCVECVE-2016-11020: Kunena before 5.0.4 does not restrict avatar file extensions to gif, jpeg, jpg, and png
CVE-2016-11020 is a critical-severity flaw (CVSS 9.8) affecting kunena. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 2.9% (top 13%) |
| CISA exploited list | No |
| Weakness | CWE-434 |
| Published | 2020-02-25 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2016-11020?
kunena: upgrade to 5.0.4. Exact commands for each OS are on this page.
Is CVE-2016-11020 being exploited?
CVE-2016-11020 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2016-11020 affect?
CVE-2016-11020 affects kunena. Severity is critical (CVSS 9.8). 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.
How urgent is CVE-2016-11020?
Priority 61/100. Critical severity; Remotely exploitable, no login, no user action