CVE-2021-40887 Path traversal in n/a

Critical 9.8 Published 11 Oct 2021 Updated 4 Aug 2024

An attacker can exploit a directory traversal flaw in ProjectSend to move arbitrary files to the upload directory, potentially exposing or modifying system files.

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-2021-40887?

CVE-2021-40887 is a critical path traversal vulnerability in n/a, published on 11 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Projectsend version r1295 is affected by a directory traversal vulnerability. Because of lacking sanitization input for files[] parameter, an attacker can add ../ to move all PHP files or any file on the system that has permissions to /upload/files/ folder.

Weakness: CWE-22

Which versions are affected by CVE-2021-40887?

It affects 1 product.

Products include Projectsend Projectsend.

How do I fix CVE-2021-40887?

No fix has been published for CVE-2021-40887 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-2021-40887 being exploited?

There is no known exploitation of CVE-2021-40887 in the wild and no public exploit code.

Sources

Also known as GHSA-x5xx-j968-8f6j.