CVE-2021-24593: Business Hours Indicator < 2.3.5 - Authenticated Stored XSS

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-08-30 · updated 2026-06-17
Weakness: CWE-79

Description

The Business Hours Indicator WordPress plugin before 2.3.5 does not sanitise or escape its 'Now closed message" setting when outputting it in the backend and frontend, leading to an Authenticated Stored Cross-Site Scripting issue

Affected products

Business Hours Indicator: before 2.3.5 — fixed in 2.3.5

How to fix

Upgrade to a fixed version: Business Hours Indicator 2.3.5. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/309296d4-c397-4fc7-85fb-a28b5b5b6a8d
https://wpscan.com/vulnerability/309296d4-c397-4fc7-85fb-a28b5b5b6a8d

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