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CVE-2025-24920

Unauthorized Bookmark Creation and Modification in Archived Channels

4.3 MediumFix available

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark creation and updates in archived channels, which allows authenticated users created or update bookmarked in archived channels

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
None

Exploit likelihood

0.24%Up 0.2 points since Mar 21, 2025
90%50%10%1%

What each source reports

CVE List Score used 4.3

Unauthorized Bookmark Creation and Modification in Archived Channels

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark creation and updates in archived channels, which allows authenticated users created or update bookmarked in archived channels

Record
CVE-2025-24920
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-863
Updated
2026-11-02
EUVDEUVD-2025-7226 4.3

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark creation and updates in archived channels, which allows authenticated users created or update bookmarked in archived channels

Record
EUVD-2025-7226
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-rp74-x43m-cpw3 4.3

Mattermost Fails to Restrict Bookmark Creation and Updates in Archived Channels

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark creation and updates in archived channels, which allows authenticated users created or update bookmarked in archived channels

Record
GHSA-rp74-x43m-cpw3
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-863
Updated
2026-11-02
NVD 4.3

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark creation and updates in archived channels, which allows authenticated users created or update bookmarked in archived channels

Record
CVE-2025-24920
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-863
Updated
2026-11-02
OSV 4.3

Unauthorized Bookmark Creation and Modification in Archived Channels

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark creation and updates in archived channels, which allows authenticated users created or update bookmarked in archived channels

Record
CVE-2025-24920
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-863
Updated
2026-11-02
OSVGHSA-rp74-x43m-cpw3 4.3

Mattermost Fails to Restrict Bookmark Creation and Updates in Archived Channels

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark creation and updates in archived channels, which allows authenticated users created or update bookmarked in archived channels

Record
GHSA-rp74-x43m-cpw3
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-863
Updated
2026-11-02
OSVBIT-mattermost-2025-24920 No score

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark creation and updates in archived channels, which allows authenticated users created or update bookmarked in archived channels

Record
BIT-mattermost-2025-24920
Updated
2026-11-02
OSVGO-2025-3552 No score

Mattermost Fails to Restrict Bookmark Creation and Updates in Archived Channels in github.com/mattermost/mattermost-server

Mattermost Fails to Restrict Bookmark Creation and Updates in Archived Channels in github.com/mattermost/mattermost-server

Record
GO-2025-3552
Updated
2026-11-02
OSVopenSUSE-SU-2025:14937-1 No score

govulncheck-vulndb-0.0.20250327T184518-1.1 on GA media

These are all security issues fixed in the govulncheck-vulndb-0.0.20250327T184518-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2025:14937-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/mattermost/mattermost/server/v8
Go
 10.4.0 up to 10.4.3
10.4.3
github.com/mattermost/mattermost/server/v8
Go
 10.3.0 up to 10.3.4
10.3.4
github.com/mattermost/mattermost/server/v8
Go
 9.11.0 up to 9.11.9
9.11.9
github.com/mattermost/mattermost/server/v8
Go
 10.5.0 to 10.5.0
10.5.1
mattermost
Bitnami
 9.11.0 up to 10.0.0, 10.3.0 up to 10.5.1
10.0.010.5.1
github.com/mattermost/mattermost/server/v8
Go
 10.5.0 up to 10.5.1
10.5.1
github.com/mattermost/mattermost-server
Go
 9.11.0+incompatible up to 9.11.9+incompatible, 10.3.0+incompatible up to 10.3.4+incompatible, 10.4.0+incompatible up to 10.4.3+incompatible, 10.5.0+incompatible up to 10.5.1+incompatible
9.11.9+incompatible10.3.4+incompatible10.4.3+incompatible10.5.1+incompatible
github.com/mattermost/mattermost-server/v5
Go
 All versions None known
github.com/mattermost/mattermost-server/v6
Go
 All versions None known
github.com/mattermost/mattermost/server/v8
Go
 All versions None known
govulncheck-vulndb
openSUSE:Tumbleweed
From an advisory covering 30 CVEs
 before 0.0.20250327T184518-1.1
0.0.20250327T184518-1.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-24920 is a medium vulnerability (CVSS 4.3) in Mattermost, published March 21, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 14th percentile. Fixed in github.com/mattermost/mattermost/server/v8 10.4.3.

References

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