Detections
Analytics

SCA: security update for jsx-slack (GHSA-hp68-xhvj-x6j6)

high Tenable Self-Hosted Container Security Plugin ID 431973

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - jsx-slack is a package for building JSON objects for Slack block kit surfaces from JSX. The maintainers
 found the patch for CVE-2021-43838 in jsx-slack v4.5.1 is insufficient tfor protection from a Regular
 Expression Denial of Service (ReDoS) attack. If an attacker can put a lot of JSX elements into
 `<blockquote>` tag _with including multibyte characters_, an internal regular expression for escaping
 characters may consume an excessive amount of computing resources. v4.5.1 passes the test against ASCII
 characters but misses the case of multibyte characters. jsx-slack v4.5.2 has updated regular expressions
 for escaping blockquote characters to prevent catastrophic backtracking. It is also including an updated
 test case to confirm rendering multiple tags in `<blockquote>` with multibyte characters. (CVE-2021-43843)

See Also

https://github.com/advisories/GHSA-hp68-xhvj-x6j6

Plugin Details

Severity: High

ID: 431973

Version: Revision 1.2

Type: Local

Family: SCA Checks

Published: 8/7/2025

Updated: 1/27/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2021-43843

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/6/2022

Vulnerability Publication Date: 12/20/2021

Reference Information

CVE: CVE-2021-43843

cwe: CWE-400