Is CVE-2025-14822 in the CISA KEV catalog?

No. CVE-2025-14822 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-14822?

CVE-2025-14822 has a CVSS v3 base score of 3.1 (LOW).

What is the EPSS score for CVE-2025-14822?

CVE-2025-14822 has an EPSS score of 0.32% (24th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-14822?

Upgrade mattermost server to 10.11.9 or later.

CVE & CISA-KEV Catalog

CVE-2025-14822

LOW

3.1

CVSS v3

NVD

Description

Mattermost versions 10.11.x <= 10.11.8 fail to validate input size before processing hashtags which allows an authenticated attacker to exhaust CPU resources via a single HTTP request containing a post with thousands space-separated tokens

CWE-407 CWE-770Allocation of Resources Without Limits or Throttling

How to fix

Remediation Available

mattermost serverNVD

Affected:>= 10.11.0, < 10.11.9Fixed in:10.11.9CVE-2025-14822derived 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 ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.32%probability of exploitation in 30 days

24thpercentile

Low risk: more likely to be exploited than 24% 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 2026-01-20.