5.3

CVE-2016-11076: mattermost mattermost_server Improper Certificate Validation

CVSS: 5.3v3.1MediumModified
AliasesGHSA-379p-37xc-q963GO-2025-4054
Published 19-06-2020Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2016-11076 is a medium (CVSS 5.3) Improper Certificate Validation vulnerability in mattermost mattermost_server. EPSS estimates a 0.88% chance of exploitation in the next 30 days, higher than 58.4% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
0.88%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2025:15710-1OPENSUSE-SU-2026:21483-1

Timeline

  1. 19-06-2020
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in Mattermost Server before 3.0.0. It does not ensure that a cookie is used over SSL.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.88%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

+0.01 pp

From 0.87% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.88%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Github.com/mattermost1 product
  • mattermost-server< 3.0.0 | < 3.0.0+incompatible
Mattermost1 product

2 vendors · 2 products

References

6 links