Description
jsx-slack is a library for building JSON objects for Slack Block Kit surfaces from JSX. In versions prior to 4.5.1 users are vulnerable to a regular expression denial-of-service (ReDoS) attack. If attacker can put a lot of JSX elements into `<blockquote>` tag, an internal regular expression for escaping characters may consume an excessive amount of computing resources. jsx-slack v4.5.1 has patched to a regex for escaping blockquote characters. Users are advised to upgrade as soon as possible.
References (2)
Core 2
Core References
Exploit, Patch, Third Party Advisory x_refsource_confirm
https://github.com/yhatt/jsx-slack/security/advisories/GHSA-55xv-f85c-248q
Patch, Third Party Advisory x_refsource_misc
https://github.com/yhatt/jsx-slack/commit/36e4a10405e4c7745333e245fcc5029c02c7065d
Scores
CVSS v3
5.3
EPSS
0.0033
EPSS Percentile
56.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Details
CWE
CWE-1333
CWE-400
Status
published
Products (2)
jsx-slack_project/jsx-slack
< 4.5.2
npm/jsx-slack
0 - 4.5.1npm
Published
Dec 17, 2021
Tracked Since
Feb 18, 2026