CVE-2025-20072 Mobile crash via improper validation of proto style in attachments
An attacker can crash the Mattermost mobile application by sending crafted attachments with invalid proto styles, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-20072?
CVE-2025-20072 is a medium-severity denial of service vulnerability in Mattermost, published on 16 Jan 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mattermost Mobile versions <= 2.22.0 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 mobile via crafted malicious input.
Weakness: CWE-704
Which versions are affected by CVE-2025-20072?
It affects 1 product.
Products include Mattermost Mattermost Mobile.
How do I fix CVE-2025-20072?
No fix has been published for CVE-2025-20072 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-20072 being exploited?
There is no known exploitation of CVE-2025-20072 in the wild and no public exploit code.
Other vulnerabilities in Mattermost
Sources
Also known as GHSA-778q-j98c-h63p.