CVE-2021-25833 12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
A remote attacker can achieve code execution by exploiting a file extension handling flaw to overwrite arbitrary files 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-2021-25833?
CVE-2021-25833 is a critical path traversal vulnerability in n/a, published on 1 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A file extension handling issue was found in [server] module of ONLYOFFICE DocumentServer v4.2.0.71-v5.6.0.21. The file extension is controlled by an attacker through the request data and leads to arbitrary file overwriting. Using this vulnerability, a remote attacker can obtain remote code execution on DocumentServer.
Weakness: CWE-22
Which versions are affected by CVE-2021-25833?
It affects 1 product.
Products include Onlyoffice Document Server.
How do I fix CVE-2021-25833?
No fix has been published for CVE-2021-25833 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-25833 being exploited?
There is no known exploitation of CVE-2021-25833 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-f4rq-cvc9-g327.