CVE-2021-3331

Description

WinSCP before 5.17.10 allows remote attackers to execute arbitrary programs when the URL handler encounters a crafted URL that loads session settings. (For example, this is exploitable in a default installation in which WinSCP is the handler for sftp:// URLs.)

9.8

CVSS

Severity: Critical

CVSS 3.1 •

CVSS 2.0 •

EPSS 7.52% Top 10%

Vendor Advisory winscp.net Vendor Advisory winscp.net Vendor Advisory winscp.net

Affected: n/a n/a

References

Link	Tags
https://winscp.net/eng/docs/history#5.17.10	release notes vendor advisory
https://winscp.net/tracker/1943	patch vendor advisory
https://github.com/winscp/winscp/commit/faa96e8144e6925a380f94a97aa382c9427f688d	third party advisory patch
https://winscp.net/eng/docs/rawsettings	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-3331?: CVE-2021-3331 has been scored as a critical severity vulnerability.
How to fix CVE-2021-3331?: To fix CVE-2021-3331, 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-2021-3331 being actively exploited in the wild?: It is possible that CVE-2021-3331 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~8% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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