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CVE-2024-23488

15
FAUCET Score

CVE-2024-23488 describes an improper access restriction vulnerability in Mattermost Server. This flaw allows authenticated users to access files attached to posts in archived channels, even when the "Allow users to view archived channels" setting is disabled. Rated as MEDIUM severity with a CVSS score of 4.3, it has a low attack complexity and could lead to unauthorized information disclosure. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, <= 8.1.8CPE match
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
>= 0, <= 9.4.1CPE match
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
< 8.1.9CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
>= 9.0.0, < 9.4.2CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.1LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.31%
Probability of exploitation in next 30 days
EPSS Percentile
23.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0031 is in the 31st 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

Patch Available

Vendor Patches (2)

gopatch availablevia ghsa
Product: github.com/mattermost/mattermost/server/v8Fixed in: 9.4.2
gopatch availablevia ghsa
Product: github.com/mattermost/mattermost/server/v8Fixed in: 8.1.9

Vendor Advisories (1)

goGHSA-xgxj-j98c-59rvlow

Mattermost fails to properly restrict the access of files attached to posts

Feb 29, 2024

References

mattermost.com / security-updates
Vendor Advisory