CVE-2018-21018

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

2.56% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 83.7% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2019-09-22 14:22Z6 YR AGO

Last updated

2024-08-05 12:19Z2 YR AGO

Reserved

2019-09-22

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-613Insufficient Session ExpirationBase

Data version

5.1

Document digest

e2f7e6165112e145303de132a85d5c66c09872c2d0011e40e02ab1ea0a210296

• github.comhttps://github.com/tootsuite/mastodon/releases/tag/v2.6.2x_refsource_MISC
• github.comhttps://github.com/tootsuite/mastodon/releases/tag/v2.6.3x_refsource_MISC
• github.comhttps://github.com/tootsuite/mastodon/pull/9329x_refsource_MISC
• github.comhttps://github.com/tootsuite/mastodon/pull/9381x_refsource_MISC