CVE-2016-11063 json
Mattermost Server vulnerable to Cross-site Scripting through file preview feature
published 2020-06-19 6 y ago modified 2026-06-17 4 mo ago also GHSA-cffj-7w5c-jqjh , GO-2025-4045 , EUVD-2016-2052
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
An issue was discovered in Mattermost Server before 3.5.1. XSS can occur via file preview.
Patch / fix
- go github.com/mattermost/mattermost-server 3.5.1, 3.5.1+incompatible
- mattermost mattermost_server 3.5.1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
- govulncheck-vulndb openSUSE Tumbleweed 0.0.20251105T184115-1.1
opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2025:15710-1
Exploit prediction
0.69% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | <3.5.1 <3.5.1+incompatible |
3.5.1 3.5.1+incompatible |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/mattermost/mattermost/commit/48533aa483879a19fdd2c1e09c596aa6c028d439
web
-
mattermost.com
/security-updates/
vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2016-11063
advisory
-
github.com
/mattermost/mattermost
web
-
mattermost.com
/security-updates
web
-
github.com
/advisories/GHSA-cffj-7w5c-jqjh
advisory
Sources
- CVE List CVE-2016-11063
- GitHub Advisory GHSA-cffj-7w5c-jqjh
- NVD CVE-2016-11063
- OSV GO-2025-4045
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.