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CVE-2024-42406

17
FAUCET Score

CVE-2024-42406 affects Mattermost versions 9.11.0 and earlier, 9.10.1 and earlier, 9.9.2 and earlier, and 9.5.8 and earlier. The vulnerability allows an authenticated attacker to bypass disabled archived channel viewing restrictions, enabling retrieval of sensitive post and file information from these channels. Rated Medium with a CVSS score of 5.4, this flaw has a low attack complexity and requires low privileges, potentially leading to a limited compromise of confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 9.5.0, < 9.5.9CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
>= 9.9.0, < 9.9.3CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
>= 9.10.0, < 9.10.2CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
9.11.0CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost_server:9.11.0:-:*:*:*:*:*:*
9.11.0CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost_server:9.11.0:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.22%
Probability of exploitation in next 30 days
EPSS Percentile
12.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0022 is in the 13th percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

mattermost.com / security-updates
Vendor Advisory