CVE-2018-21018 json
Mastodon before 2.6.3 mishandles timeouts of incompletely established sessions.
published 7y ago modified 4mo ago also EUVD-2018-13542
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.6%
- EPSS 2.6% chance of exploitation in 30 days, percentile 85%
- public exploits
- 0
- none known
Summary
Mastodon before 2.6.3 mishandles timeouts of incompletely established sessions.
Patch / fix
- joinmastodon mastodon 2.6.3
- github.com/tootsuite/mastodon#9329 pull request
- github.com/tootsuite/mastodon#9381 pull request
- github.com/tootsuite/mastodon/releases/tag/v2.6.2 release
- github.com/tootsuite/mastodon/releases/tag/v2.6.3 release
Is CVE-2018-21018 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
2.56% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-613 DEPRECATED: Insufficient Session Expiration
References
-
github.com
/tootsuite/mastodon/pull/9329
patch, third-party-advisory
-
github.com
/tootsuite/mastodon/pull/9381
patch, third-party-advisory
-
github.com
/tootsuite/mastodon/releases/tag/v2.6.2
release-notes, third-party-advisory
-
github.com
/tootsuite/mastodon/releases/tag/v2.6.3
release-notes, third-party-advisory
Sources
- CVE List CVE-2018-21018
- NVD CVE-2018-21018
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.