How severe is CVE-2024-40886?

CVE-2024-40886 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2024-40886 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-40886?

CVE-2024-40886 affects Mattermost. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-40886?

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

Does CVE-2024-40886 have an EU (EUVD) identifier?

Yes. CVE-2024-40886 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2599.

When was CVE-2024-40886 published?

CVE-2024-40886 was published on 2024-08-22 and last updated on 2026-06-17.

CVE-2024-40886

CVE-2024-40886 is a medium-severity vulnerability in Mattermost with a CVSS 3.x base score of 4.6. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-2599
Weakness: CWE-352
Affected product: Mattermost
Published: 2024-08-22
Last modified: 2026-06-17

Description

Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0, 9.8.x <= 9.8.2 fail to sanitize user inputs in the frontend that are used for redirection which allows for a one-click client-side path traversal that is leading to CSRF in User Management page of the system console.

Frequently asked questions

What is CVE-2024-40886?: Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0, 9.8.x <= 9.8.2 fail to sanitize user inputs in the frontend that are used for redirection which allows for a one-click client-side path traversal that is leading to CSRF in User Management page of the system console.
How severe is CVE-2024-40886?: CVE-2024-40886 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2024-40886 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-40886?: CVE-2024-40886 affects Mattermost. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-40886?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-40886 have an EU (EUVD) identifier?: Yes. CVE-2024-40886 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2599.
When was CVE-2024-40886 published?: CVE-2024-40886 was published on 2024-08-22 and last updated on 2026-06-17.

References

https://mattermost.com/security-updates

Affected products (1)

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

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