CVE-2021-37859

moderate-risk
Published 2021-08-05

Fixed a bypass for a reflected cross-site scripting vulnerability affecting OAuth-enabled instances of Mattermost.

Do I need to act?

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45.1% chance of exploitation in next 30 days
EPSS score — higher than 55% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.1/10 High
NETWORK / HIGH complexity

Affected Products (1)

Affected Vendors

Mattermost

References (2)

Vendor Advisory https://mattermost.com/security-updates/
Vendor Advisory https://mattermost.com/security-updates/
43
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 17/34 · Moderate
Exposure 5/34 · Minimal