CVE-2021-37862: mattermost
CVSS: 5.8v2.0MediumModified
Published 17-12-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-37862 is a medium (CVSS 5.8) vulnerability in mattermost. EPSS estimates a 0.69% chance of exploitation in the next 30 days, higher than 51.8% of scored vulnerabilities.
CVSS score
5.8/10
010
Medium · v2.0 (NVD)EPSS score
0.69%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 17-12-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Mattermost 6.0 and earlier fails to sufficiently validate the email address during registration, which allows attackers to trick users into signing up using attacker-controlled email addresses via crafted invitation token.
CVSS metrics
3 scores · 2 sources · 2 versionsLow 3.7Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:NSources2 sources · 3.7–5.4
- NVDNIST5.4MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:NDiffers
Medium 5.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:NSourcesSingle source
EPSS trend
Probability
0.69%
Chance of exploitation in the next 30 days
Percentile
52%
Versus all other CVEs
30-day change
+0.02 pp
From 0.67% on 19-09-2026
19-09-202619-10-2026
EPSS score0.69%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Mattermost2 products
- mattermost≥ unspecified, ≤ 6.0
- mattermost_server≤ 6.0
1 vendor · 2 products