How severe is CVE-2025-20630?

CVE-2025-20630 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-20630 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-20630?

CVE-2025-20630 affects Mattermost Mattermost Mobile. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-20630?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-20630 have an EU (EUVD) identifier?

Yes. CVE-2025-20630 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2180.

When was CVE-2025-20630 published?

CVE-2025-20630 was published on 2025-01-16 and last updated on 2026-06-17.

CVE-2025-20630

CVE-2025-20630 is a medium-severity vulnerability in Mattermost Mattermost Mobile with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1287.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-2180
Weakness: CWE-1287
Affected product: Mattermost Mattermost Mobile
Published: 2025-01-16
Last modified: 2026-06-17

Description

Mattermost Mobile versions <=2.22.0 fail to properly handle posts with attachments containing fields that cannot be cast to a String, which allows an attacker to cause the mobile to crash via creating and sending such a post to a channel.

Frequently asked questions

What is CVE-2025-20630?: Mattermost Mobile versions <=2.22.0 fail to properly handle posts with attachments containing fields that cannot be cast to a String, which allows an attacker to cause the mobile to crash via creating and sending such a post to a channel.
How severe is CVE-2025-20630?: CVE-2025-20630 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-20630 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-20630?: CVE-2025-20630 affects Mattermost Mattermost Mobile. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-20630?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-20630 have an EU (EUVD) identifier?: Yes. CVE-2025-20630 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2180.
When was CVE-2025-20630 published?: CVE-2025-20630 was published on 2025-01-16 and last updated on 2026-06-17.

References

https://mattermost.com/security-updates

Affected products (1)

cpe:2.3:a:mattermost:mattermost_mobile:*:*:*:*:*:*:*:*

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