CVE-2023-30186 Use after free in n/a

Critical 9.8 Published 14 Aug 2023 Updated 9 Jul 2026

Remote attackers can execute arbitrary code via crafted JavaScript files due to a use-after-free vulnerability in ONLYOFFICE DocumentServer.

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-2023-30186?

CVE-2023-30186 is a critical use after free vulnerability in n/a, published on 14 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A use after free issue discovered in ONLYOFFICE DocumentServer 4.0.3 through 7.3.2 allows remote attackers to run arbitrary code via crafted JavaScript file.

Weakness: CWE-416

Which versions are affected by CVE-2023-30186?

It affects 1 product.

Products include Onlyoffice Document Server.

How do I fix CVE-2023-30186?

No fix has been published for CVE-2023-30186 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2023-30186 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-30186 exists.

Sources

Also known as GHSA-m5p8-2r8q-qjjh.