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

> Authenticated attackers can inject malicious scripts via the 'Now closed message' setting, leading to stored XSS in the Business Hours Indicator plugin.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 30 Aug 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-m8hc-gpvf-58px

## What is CVE-2021-24593?

CVE-2021-24593 is a medium-severity cross-site scripting vulnerability in Unknown Business Hours Indicator, published on 30 Aug 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official 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

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-24593?

It affects 1 product.


Products: Business Hours Indicator Project Business Hours Indicator.

## How do I fix CVE-2021-24593?

No fix has been published for CVE-2021-24593 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24593 being exploited?

There is no known exploitation of CVE-2021-24593 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24593 and fix it if it is affected.

What it is: CVE-2021-24593 is a medium-severity cross-site scripting vulnerability in Unknown Business Hours Indicator, published on 30 Aug 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-24593 in the wild and no public exploit code.

Affected product: Unknown Business Hours Indicator. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-24593/ (Markdown: https://insights.sbomify.com/CVE-2021-24593/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24593
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24593
- OSV: https://osv.dev/vulnerability/CVE-2021-24593

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24593/
Summaries are generated and may contain mistakes; the official description above is the record.