How severe is CVE-2024-21848?

CVE-2024-21848 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2024-21848 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21848?

CVE-2024-21848 affects Mattermost Mattermost Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-21848?

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

Does CVE-2024-21848 have an EU (EUVD) identifier?

Yes. CVE-2024-21848 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1339.

When was CVE-2024-21848 published?

CVE-2024-21848 was published on 2024-04-05 and last updated on 2026-06-17.

CVE-2024-21848

CVE-2024-21848 is a low-severity vulnerability in Mattermost Mattermost Server with a CVSS 3.x base score of 3.1. 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-273.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-1339
Weakness: CWE-273
Affected product: Mattermost Mattermost Server
Published: 2024-04-05
Last modified: 2026-06-17

Description

Improper Access Control in Mattermost Server versions 8.1.x before 8.1.11 allows an attacker that is in a channel with an active call to keep participating in the call even if they are removed from the channel

Frequently asked questions

What is CVE-2024-21848?: Improper Access Control in Mattermost Server versions 8.1.x before 8.1.11 allows an attacker that is in a channel with an active call to keep participating in the call even if they are removed from the channel
How severe is CVE-2024-21848?: CVE-2024-21848 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2024-21848 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21848?: CVE-2024-21848 affects Mattermost Mattermost Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-21848?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-21848 have an EU (EUVD) identifier?: Yes. CVE-2024-21848 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1339.
When was CVE-2024-21848 published?: CVE-2024-21848 was published on 2024-04-05 and last updated on 2026-06-17.

References

https://mattermost.com/security-updates

Affected products (1)

cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

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