CVE-2021-25631

Public Exploit
denylist of executable filename extensions possible to bypass under windows

Description

In the LibreOffice 7-1 series in versions prior to 7.1.2, and in the 7-0 series in versions prior to 7.0.5, the denylist can be circumvented by manipulating the link so it doesn't match the denylist but results in ShellExecute attempting to launch an executable type.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.09% Top 25%
Vendor Advisory libreoffice.org
Affected: The Document Foundation LibreOffice
Published at:
Updated at:

References

Link Tags
https://positive.security/blog/url-open-rce#open-libreoffice third party advisory exploit
https://www.libreoffice.org/about-us/security/advisories/cve-2021-25631/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-25631?
CVE-2021-25631 has been scored as a high severity vulnerability.
How to fix CVE-2021-25631?
To fix CVE-2021-25631, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-25631 being actively exploited in the wild?
It is possible that CVE-2021-25631 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-25631?
CVE-2021-25631 affects The Document Foundation LibreOffice.
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