CVE-2019-20856 Code injection in n/a
An attacker can execute arbitrary code on macOS by injecting malicious dynamic libraries into the Mattermost Desktop App.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-20856?
CVE-2019-20856 is a critical code injection vulnerability in n/a, published on 19 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in Mattermost Desktop App before 4.3.0 on macOS. It allows dylib injection.
Weakness: CWE-427
Which versions are affected by CVE-2019-20856?
It affects 1 product.
Products include Mattermost Mattermost Desktop.
How do I fix CVE-2019-20856?
No fix has been published for CVE-2019-20856 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2019-20856 being exploited?
There is no known exploitation of CVE-2019-20856 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2016-11064 Code injection in n/a
- CVE-2019-20861 Code injection in n/a
- CVE-2026-1046 Arbitrary application execution via unvalidated server-controlled URLs in Help menu
- CVE-2020-14456 Security feature bypass in n/a
- CVE-2026-8075 Posting a malicious markdown image crashes the Mattermost Desktop App
Sources
Also known as GHSA-jmf2-h546-v465.