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CVE-2023-4478

HIGHCVSS 8.2/10EPSS 0.44%

Last modified

CVE-2023-4478 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. Mattermost fails to restrict which parameters' values it takes from the request during signup allowing an attacker to register users as inactive, thus blocking them from later accessing Mattermost without the system admin activating their accounts. . EPSS estimates a 0.44% chance of exploitation in the next 30 days.

Description

Mattermost fails to restrict which parameters' values it takes from the request during signup allowing an attacker to register users as inactive, thus blocking them from later accessing Mattermost without the system admin activating their accounts.

Metrics

CVSS 3.1
8.2/10

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

EPSS Probability
0.44%

35.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MattermostMattermost Server< 7.8.9
MattermostMattermost Server>= 7.9.0, < 7.10.5
MattermostMattermost Server8.0.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-4478?
Mattermost fails to restrict which parameters' values it takes from the request during signup allowing an attacker to register users as inactive, thus blocking them from later accessing Mattermost without the system admin activating their accounts.
How severe is CVE-2023-4478?
CVE-2023-4478 has a CVSS score of 8.2/10 (HIGH severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.
How do I fix CVE-2023-4478?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4478?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST