CVE-2017-18917: mattermost mattermost_server
CVSS: 7.5v3.1HighModified
AliasesGHSA-jxc4-w54c-qv5rGO-2026-4463
Published 19-06-2020Last modified 05-08-2024
Vulnerability summary
CVE-2017-18917 is a high (CVSS 7.5) vulnerability in mattermost mattermost_server. EPSS estimates a 0.72% chance of exploitation in the next 30 days, higher than 53.2% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
0.72%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 19-06-2020PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7. Weak hashing was used for e-mail invitations, OAuth, and e-mail verification tokens.
CVSS metrics
3 scores · 2 sources · 3 versionsHigh 8.8Preferred score · OSV · Go (Ecosystem advisory) · calculated from vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:NSourcesSingle source
High 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NSourcesSingle source
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
0.72%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
+0.01 pp
From 0.71% on 22-09-2026
22-09-202622-10-2026
EPSS score0.72%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Github.com/mattermost1 product
- mattermost-server< 3.7.5-0.20170421192444-247cd1e51a8c | ≥ 3.8.0, < 3.8.2 | ≥ 3.8.0+incompatible, < 3.8.2+incompatible
Mattermost1 product
- mattermost_server≥ 3.6.0, < 3.6.7 | ≥ 3.7.0, < 3.7.5 | ≥ 3.8.0, < 3.8.2
2 vendors · 2 products
