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CVE-2018-21031

23
FAUCET Score

CVE-2018-21031 describes an access control bypass vulnerability in Tautulli versions 2.1.38 and below. Attackers can retrieve the X-Plex-Token from Tautulli, enabling unauthorized access to the associated Plex Media Server. This medium-severity vulnerability (CVSS 6.5) requires low privileges and network access, potentially leading to high confidentiality impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.18.2.2029-36236cc4cCPE matchmatch criteria
cpe:2.3:a:plex:media_server:1.18.2.2029-36236cc4c:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.06%
Probability of exploitation in next 30 days
EPSS Percentile
79.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0206 is in the 91st percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

forums.plex.tv / t/security-regarding-cve-2018-21031/493286
Third Party Advisory
twitter.com / GerardFuguet/status/1009937529573912576
Third Party Advisory
elladodelmal.com / 2018/08/shodan-es-de-cine-hacking-tautulli-un.html
ExploitThird Party Advisory
exploit-db.com / docs/47790
ExploitThird Party AdvisoryVDB Entry