CVE-2016-11020

CRITICALNVD 9.89.8—

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.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 87.6%
KEV: Not listed

Published

February 25, 2020

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated May 27, 2026

Upstream fix merged — awaiting tagged release. Sources: github_pr.

generic

Changelog - Kunena - To Speak! Next Generation Forum Component for Joomla

https://www.kunena.org/bugs/changelog

generic

Kunena 5.0.4 Released - Security Release - Kunena - To Speak! Next Generation Forum Component for Joomla

https://www.kunena.org/blog/179-kunena-5-0-4-released

github_pr

Improve avatar check

Fix merged in Kunena/Kunena-Forum PR #5028 on 2016-11-22 — awaiting tagged release

https://github.com/Kunena/Kunena-Forum/pull/5028

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-434Unrestricted Upload of File with Dangerous Type

Data Freshness Timeline

(refreshed 7× in last 7d / 7× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 07:16 UTCEG score recompute
2026-05-27 07:16 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:43 UTCepss_batch

Frequently asked(5)

What is CVE-2016-11020?

CVE-2016-11020 is a critical vulnerability published on February 25, 2020. 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.

When was CVE-2016-11020 disclosed?

CVE-2016-11020 was first published in the National Vulnerability Database on February 25, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2016-11020 actively exploited?

CVE-2016-11020 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 87.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2016-11020?

CVE-2016-11020 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2016-11020?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-11020, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2016-11020

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