CVE-2021-25831 Code injection in n/a
Remote attackers can achieve code execution on ONLYOFFICE DocumentServer by exploiting file extension handling flaws during PPTT to PPTX conversion.
- 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-2021-25831?
CVE-2021-25831 is a critical code injection 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 [core] module of ONLYOFFICE DocumentServer v4.0.0-9-v5.6.3. An attacker must request the conversion of the crafted file from PPTT into PPTX format. Using the chain of two other bugs related to improper string handling, a remote attacker can obtain remote code execution on DocumentServer.
Which versions are affected by CVE-2021-25831?
It affects 1 product.
Products include Onlyoffice Document Server.
How do I fix CVE-2021-25831?
No fix has been published for CVE-2021-25831 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-2021-25831 being exploited?
There is no known exploitation of CVE-2021-25831 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-m252-hx7q-7p3h.