CVE-2024-39899 (CVSS 5.3)

Description

PrivateBin is an online pastebin where the server has zero knowledge of pasted data. In v1.5, PrivateBin introduced the YOURLS server-side proxy. The idea was to allow using the YOURLs URL shortener without running the YOURLs instance without authentication and/or exposing the authentication token to the public, allowing anyone to shorten any URL. With the proxy mechanism, anyone can shorten any URL pointing to the configured PrivateBin instance. The vulnerability allowed other URLs to be shortened, as long as they contain the PrivateBin instance, defeating the limit imposed by the proxy. This vulnerability is fixed in 1.7.4.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-305 CWE-305

CWE-791 CWE-791

References

Other References

https://github.com/PrivateBin/PrivateBin/commit/0c4e810e6728f67d678458838d8430dfba4fcca4 https://github.com/PrivateBin/PrivateBin/pull/1370 https://github.com/PrivateBin/PrivateBin/security/advisories/GHSA-mqqj-fx8h-437j https://github.com/PrivateBin/PrivateBin/commit/0c4e810e6728f67d678458838d8430dfba4fcca4 https://github.com/PrivateBin/PrivateBin/pull/1370 https://github.com/PrivateBin/PrivateBin/security/advisories/GHSA-mqqj-fx8h-437j

Frequently Asked Questions

What is CVE-2024-39899? +

PrivateBin is an online pastebin where the server has zero knowledge of pasted data. In v1.5, PrivateBin introduced the YOURLS server-side proxy. The idea was to allow using the YOURLs URL shortener without running the YOURLs instance without authentication and/or exposing the authentication token to the public, allowing anyone to shorten any URL. With the proxy mechanism, anyone can shorten any URL pointing to the configured PrivateBin instance. The vulnerability allowed other URLs to be shortened, as long as they contain the PrivateBin instance, defeating the limit imposed by the proxy. This vulnerability is fixed in 1.7.4. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-39899? +

CVE-2024-39899 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2024-39899? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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