Vulnerability Details CVE-2021-43838
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 55.6%
CVSS Severity
CVSS v3 Score 5.3
CVSS v2 Score 5.0
References
- https://github.com/yhatt/jsx-slack/commit/36e4a10405e4c7745333e245fcc5029c02c7065d
- https://github.com/yhatt/jsx-slack/security/advisories/GHSA-55xv-f85c-248q
- https://github.com/yhatt/jsx-slack/commit/36e4a10405e4c7745333e245fcc5029c02c7065d
- https://github.com/yhatt/jsx-slack/security/advisories/GHSA-55xv-f85c-248q
Products affected by CVE-2021-43838
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.1.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.10.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.10.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.10.2
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.11.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.11.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.12.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.2.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.3.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.4.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.4.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.4.2
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.4.3
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.5.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.5.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.6.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.7.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.8.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.8.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.9.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.9.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:0.9.2
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cpe:2.3:a:jsx-slack_project:jsx-slack:1.0.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:1.1.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:1.2.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:1.3.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:1.3.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:1.4.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:1.5.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:1.5.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:1.6.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:1.7.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:2.0.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:2.1.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:2.2.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:2.2.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:2.3.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:2.4.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:2.5.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:2.5.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:2.6.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:3.0.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:4.0.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:4.1.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:4.2.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:4.2.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:4.3.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:4.4.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:4.4.1
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cpe:2.3:a:jsx-slack_project:jsx-slack:4.4.2
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cpe:2.3:a:jsx-slack_project:jsx-slack:4.4.3
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cpe:2.3:a:jsx-slack_project:jsx-slack:4.5.0
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cpe:2.3:a:jsx-slack_project:jsx-slack:4.5.1