HOMEVULNERABILITIESCVE-2020-25200
MEDIUM

CVE-2020-25200

CWE-203Published: October 1, 2020· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official Description

Pritunl 1.29.2145.25 allows attackers to enumerate valid VPN usernames via a series of /auth/session login attempts. Initially, the server will return error 401. However, if the username is valid, then after 20 login attempts, the server will start responding with error 400. Invalid usernames will receive error 401 indefinitely. Note: This has been disputed by the vendor as not a vulnerability. They argue that this is an intended design

NVD Source

Technical Analysis

CVE-2020-25200 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

pritunl1 product(s)
pritunl
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/lukaszstu/pritunl/blob/master/CVE-2020-25200
ADVISORYhttps://pritunl.com
ADVISORYhttps://pritunl.com/security
ADVISORYhttps://github.com/lukaszstu/pritunl/blob/master/CVE-2020-25200
ADVISORYhttps://pritunl.com
ADVISORYhttps://pritunl.com/security

All References (6)

→
https://github.com/lukaszstu/pritunl/blob/master/CVE-2020-25200Exploit · Third Party Advisory
→
https://pritunl.comVendor Advisory
→
https://pritunl.com/securityVendor Advisory
→
https://github.com/lukaszstu/pritunl/blob/master/CVE-2020-25200Exploit · Third Party Advisory
→
https://pritunl.comVendor Advisory
→
https://pritunl.com/securityVendor Advisory

Quick Facts

CVE IDCVE-2020-25200
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-203
CISA KEVNo
Affected1 vendor(s)
PublishedOct 1, 2020

Related CVEs (CWE-203)

CVE-2023-50708
9.8
CVE-2023-40756
9.8
CVE-2018-1000884
9.8
CVE-2022-23303
9.8
CVE-2019-25337
9.8
CVE-2024-23771
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-25200 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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