CVE-2025-21083

MEDIUMNVD 6.56.5—Trending — 4 sources updated this week

6.5

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.

CVSS v3: 6.5
EG Score: 6.5(medium)
EPSS: 64.4%
KEV: Not listed

Published

January 15, 2025

Last Modified

September 25, 2025

References (1)

responsibledisclosure@mattermosthttps://mattermost.com/security-updates

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-1287

Data Freshness Timeline

(refreshed 12× in last 7d / 12× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-30 13:15 UTCEG score recompute
2026-05-30 13:15 UTCGHSA enrichment
2026-05-30 09:01 UTCOSV refresh
2026-05-29 13:44 UTCepss_batch

Frequently asked(5)

What is CVE-2025-21083?

CVE-2025-21083 is a medium vulnerability published on January 15, 2025. 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.

When was CVE-2025-21083 disclosed?

CVE-2025-21083 was first published in the National Vulnerability Database on January 15, 2025, with the most recent update on September 25, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-21083 actively exploited?

CVE-2025-21083 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 64.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

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

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

How do I remediate CVE-2025-21083?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21083, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-21083

📅 Published

🔄 Last Modified

🔗 References (1)