CVE-2025-20621

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Source
https://cve.org/CVERecord?id=CVE-2025-20621
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-20621.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-20621
Aliases
Downstream
Related
Published
2025-01-16T19:15:29.960Z
Modified
2026-04-10T05:22:14.679896Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly handle posts with attachments containing fields that cannot be cast to a String, which allows an attacker to cause the webapp to crash via creating and sending such a post to a channel.

References

Affected packages

Git / github.com/mattermost/mattermost-server

Affected ranges

Type
GIT
Repo
https://github.com/mattermost/mattermost-server
Events
Introduced
0bc2ddd42375a75ab14e63f038165150d4f07659
Fixed
51ac054df0cf662ef3fa4657df4e058a33687135
Introduced
2d83d21388f3111bffe4b1f63521b21d77ec2cef
Fixed
ff3c76437efdef1fdf44f92434ac588e4d4e964c
Introduced
50f91e2453188bbd0153db0e98714022db022a5c
Fixed
90937a3832837b2d193c25aada123ee88942ebed
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
9a578312304f06bb423d668fa8f1b975dc1fe79a
Database specific 
{
    "versions": [
        {
            "introduced": "9.11.0"
        },
        {
            "fixed": "9.11.6"
        },
        {
            "introduced": "10.0.0"
        },
        {
            "fixed": "10.0.4"
        },
        {
            "introduced": "10.1.0"
        },
        {
            "fixed": "10.1.4"
        },
        {
            "introduced": "0"
        },
        {
            "last_affected": "10.2.0-NA"
        }
    ]
}

Affected versions

@mattermost/client@10.*
@mattermost/client@10.0.0
@mattermost/client@10.1.0
@mattermost/client@9.*
@mattermost/client@9.11.0
@mattermost/types@10.*
@mattermost/types@10.0.0
@mattermost/types@10.1.0
@mattermost/types@9.*
@mattermost/types@9.11.0
Other
cloud-2022-07-20-1
cloud-2022-08-10-1
cloud-2022-09-08-1
cloud-2022-10-06-1
cloud-2022-11-11-1
cloud-2022-11-24-1
server/public/v0.*
server/public/v0.0.10
server/public/v0.0.11
server/public/v0.0.12
server/public/v0.0.13
server/public/v0.0.14
server/public/v0.0.15
server/public/v0.0.16
server/public/v0.0.17
server/public/v0.0.18
server/public/v0.0.5
server/public/v0.0.6
server/public/v0.0.7
server/public/v0.0.8
server/public/v0.0.9
server/public/v0.1.0
server/public/v0.1.1
server/public/v0.1.2
server/public/v0.1.3
server/public/v0.1.4
server/public/v0.1.5
server/public/v0.1.6
server/public/v0.1.7
v0.*
v0.5.0
v10.*
v10.0.0
v10.0.0-rc4
v10.0.1
v10.0.1-rc1
v10.0.2
v10.0.2-rc1
v10.0.2-rc2
v10.0.3
v10.0.3-rc1
v10.0.4-rc1
v10.0.4-rc2
v10.1.0
v10.1.0-rc3
v10.1.1
v10.1.1-rc1
v10.1.2
v10.1.2-rc1
v10.1.3
v10.1.3-rc1
v10.1.4-rc1
v10.2.0
v10.2.0-rc1
v10.2.0-rc2
v10.2.0-rc3
v4.*
v4.10.0-rc1
v4.2.0-rc1
v4.3.0-rc1
v4.4.0-rc1
v4.5.0-rc1
v4.6.0-rc1
v4.6.0-rc2
v4.7.0-rc1
v4.8.0-rc1
v4.9.0-rc1
v5.*
v5.0.0-rc1
v5.1.0-rc1
v5.2.0-rc1
v5.2.0-rc2
v9.*
v9.11.0
v9.11.0-rc3
v9.11.1
v9.11.1-rc1
v9.11.2
v9.11.2-rc1
v9.11.2-rc2
v9.11.3
v9.11.3-rc1
v9.11.3-rc2
v9.11.4
v9.11.4-rc1
v9.11.5
v9.11.5-rc1
v9.11.6-rc1
v9.11.6-rc2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-20621.json"