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CVE-2017-18902

19
FAUCET Score

CVE-2017-18902 is a low-severity information disclosure vulnerability affecting Mattermost Server versions prior to 4.1.0, 4.0.4, and 3.10.3. An unauthenticated attacker can exploit this flaw via team API endpoints to discover team invite IDs. While the CVSS score is 5.3 (MEDIUM), indicating low impact on confidentiality and no impact on integrity or availability, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.10.3CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.0.4CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.92%
Probability of exploitation in next 30 days
EPSS Percentile
56.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0092 is in the 35th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

gopatch availablevia ghsa
Product: github.com/mattermost/mattermost-serverFixed in: 3.10.3
gopatch availablevia ghsa
Product: github.com/mattermost/mattermost-serverFixed in: 4.0.4
gopatch availablevia ghsa
Product: github.com/mattermost/mattermost-serverFixed in: 4.1.0

Vendor Advisories (1)

goGHSA-jwfv-5hwq-f97rmedium

Mattermost Server exposes team invite IDs through API endpoints

May 24, 2022

References

mattermost.com / security-updates
Vendor Advisory