PT-2020-16013 · Pritunl · Pritunl

Lukaszstu · Published 2020-10-01 · Updated 2025-12-22 · CVE-2020-25200

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Pritunl version 1.29.2145.25

Description The issue allows attackers to enumerate valid VPN usernames via a series of "/auth/session" login attempts. Initially, the server returns error 401. However, if the username is valid, then after 20 login attempts, the server starts responding with error 400. Invalid usernames receive error 401 indefinitely. The vendor has disputed this as a vulnerability, arguing it is an intended design.

Recommendations For Pritunl version 1.29.2145.25, as a temporary workaround, consider restricting access to the /auth/session endpoint to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Side Channel Attack

Weakness Enumeration

CWE-203

Related Identifiers

CVE-2020-25200

Affected Products

Pritunl

References · 9

• 🔥 https://github.com/lukaszstu/pritunl-CVE-2020-25200 · Exploit
• 🔥 https://github.com/lukaszstu/pritunl/blob/master/CVE-2020-25200 · Exploit
• https://osv.dev/vulnerability/CVE-2020-25200 · Vendor Advisory
• https://pritunl.com/security · Vendor Advisory
• https://pritunl.com · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-25200 · Security Note
• https://twitter.com/pdnuclei_bot/status/2003073066159743024 · Twitter Post
• https://t.me/cvenotify/89022 · Telegram Post
• https://t.me/cvenotify/7933 · Telegram Post