CVE-2025-0503

LOWNVD 3.13.1—Trending — 4 sources updated this week

3.1

Mattermost versions 9.11.x <= 9.11.6 fail to filter out DMs from the deleted channels endpoint which allows an attacker to infer user IDs and other metadata from deleted DMs if someone had manually marked DMs as deleted in the database.

CVSS v3: 3.1
EG Score: 3.1(medium)
EPSS: 58.7%
KEV: Not listed

Published

February 14, 2025

Last Modified

September 29, 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-754

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 11:40 UTCEG score recompute
2026-05-30 11:40 UTCGHSA enrichment
2026-05-29 13:43 UTCepss_batch
2026-05-29 13:40 UTCOSV refresh

Frequently asked(5)

What is CVE-2025-0503?

CVE-2025-0503 is a low vulnerability published on February 14, 2025. Mattermost versions 9.11.x <= 9.11.6 fail to filter out DMs from the deleted channels endpoint which allows an attacker to infer user IDs and other metadata from deleted DMs if someone had manually marked DMs as deleted in the database.

When was CVE-2025-0503 disclosed?

CVE-2025-0503 was first published in the National Vulnerability Database on February 14, 2025, with the most recent update on September 29, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-0503 actively exploited?

CVE-2025-0503 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 58.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-0503?

CVE-2025-0503 has a CVSS v3 base score of 3.1 (NVD).

How do I remediate CVE-2025-0503?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-0503, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-0503

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CVE-2025-0503

📅 Published

🔄 Last Modified

🔗 References (1)