🛡️ CVE-2016-11063 — mattermost-server

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. Rated impact: confidentiality none, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Attack requirements: None — no deployment-specific condition has to hold.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: Passive — a victim action is involved, but not a deliberate one.
• Confidentiality impact: None.
• Integrity impact: None.
• Availability impact: None.

Weakness class

CVE-2016-11063 is classified as CWE-79: Cross-site Scripting (XSS). User-supplied data is written into a page without escaping, so attacker script runs in the browser of anyone who views it.

Affected software

CVE-2016-11063 is recorded against 1 package.

• github.com/mattermost/mattermost-server

Timeline and source

Published on 24 May 2022 and last revised on 3 March 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
mattermost.com (Web)

Other advisories for this package

github.com/mattermost/mattermost-server has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-4646 (published 7 Jul 2026)
• CVE-2026-3473 (8.0 High, published 7 Jul 2026)
• CVE-2026-5755 (published 7 Jul 2026)
• CVE-2026-4635 (published 7 Jul 2026)
• CVE-2026-28735 (published 7 Jul 2026)
• CVE-2026-5308 (8.0 High, published 7 Jul 2026)
• CVE-2026-20719 (published 25 Jun 2026)
• CVE-2026-3590 (published 25 Jun 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-79: Cross-site Scripting (XSS)) in other software:

• CVE-2017-1000482 (published 9 Jul 2026)
• CVE-2011-4924 (published 9 Jul 2026)
• CVE-2021-3988 (published 7 Jul 2026)
• CVE-2017-20182 (published 7 Jul 2026)
• CVE-2014-0157 (published 6 Jul 2026)
• CVE-2017-1000426 (published 6 Jul 2026)
• CVE-2018-25045 (published 6 Jul 2026)
• CVE-2013-2209 (published 6 Jul 2026)

Details

Affected Packages

References