CVE-2018-21031

Name: CVE-2018-21031
Creator: NVD / NIST
Published: 2019-11-18T17:15:10.847+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 2.06%

Last modified Jun 17, 2026

CVE-2018-21031 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Tautulli versions 2.1.38 and below allows remote attackers to bypass intended access control in Plex Media Server because the X-Plex-Token is mishandled and can be retrieved from Tautulli. NOTE: Initially, this id was associated with Plex Media Server 1.18.2.2029-36236cc4c as the affected product and version. EPSS estimates a 2.06% chance of exploitation in the next 30 days.

Description

Tautulli versions 2.1.38 and below allows remote attackers to bypass intended access control in Plex Media Server because the X-Plex-Token is mishandled and can be retrieved from Tautulli. NOTE: Initially, this id was associated with Plex Media Server 1.18.2.2029-36236cc4c as the affected product and version. Further research indicated that Tautulli is the correct affected product.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

2.06%

78.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-522

Affected Software

Vendor	Product	Versions
Plex	Media Server	1.18.2.2029-36236cc4c

References

https://forums.plex.tv/t/security-regarding-cve-2018-21031/493286Third Party Advisory
https://twitter.com/GerardFuguet/status/1009937529573912576Third Party Advisory
https://www.elladodelmal.com/2018/08/shodan-es-de-cine-hacking-tautulli-un.htmlExploit, Third Party Advisory
https://www.exploit-db.com/docs/47790Exploit, Third Party Advisory, VDB Entry
https://forums.plex.tv/t/security-regarding-cve-2018-21031/493286Third Party Advisory
https://twitter.com/GerardFuguet/status/1009937529573912576Third Party Advisory
https://www.elladodelmal.com/2018/08/shodan-es-de-cine-hacking-tautulli-un.htmlExploit, Third Party Advisory
https://www.exploit-db.com/docs/47790Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Nov 18, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-21031?

How severe is CVE-2018-21031?

CVE-2018-21031 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.06% probability of exploitation in the next 30 days.

How do I fix CVE-2018-21031?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-21031?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST