Is CVE-2025-21083 in the CISA KEV catalog?

No. CVE-2025-21083 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-21083?

CVE-2025-21083 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2025-21083?

CVE-2025-21083 has an EPSS score of 0.50% (39th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-21083?

Upgrade mattermost mobile to 2.23.0 or later.

CVE & CISA-KEV Catalog

CVE-2025-21083

MEDIUM

6.5

CVSS v3

NVD

Description

Mattermost Mobile Apps versions <=2.22.0 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.

CWE-1287Improper Validation of Specified Type of Input

How to fix

Remediation Available

mattermost mobileNVD

Affected:< 2.23.0Fixed in:2.23.0CVE-2025-21083derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.50%probability of exploitation in 30 days

39thpercentile

Low risk: more likely to be exploited than 39% of all known CVEs.

References

Vendor Advisory1

mattermost.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-09-25.