CVE-2018-21031

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure.

Exploit odds

2.1% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2019-11-18 17:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:53 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.1% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2019-11-18 17:15 UTC

Last modified

2026-06-17 01:53 UTC

Exploit probability

2.1% · EPSS, next 30 days

Weakness

CWE-522

Record status

Modified

Affected

• Plex Media Server 1.18.2.2029-36236cc4c

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2018-21031.md and follow it. Check whether this project is affected by CVE-2018-21031. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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