CVE-2025-21088
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
WebApp crash via improper validation of proto style in attachments
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 validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Mattermost
- Vendor
- Mattermost
- Product
- Mattermost
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 10.2.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.11.0 | affected | semver | Unavailable | 9.11.5 | None listed |
| 10.0.0 | affected | semver | Unavailable | 10.0.3 | None listed |
| 10.1.0 | affected | semver | Unavailable | 10.1.3 | None listed |
| 10.3.0 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2.1 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 9.11.6 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 10.0.4 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 10.1.4 | unaffected | Unavailable | Unavailable | Unavailable | None listed |