# CVE-2021-24973: Site Reviews < 5.17.3 - Unauthenticated Stored Cross-Site Scripting

> Unauthenticated attackers can inject malicious scripts via the site-reviews parameter, leading to XSS attacks against logged-in administrators.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 3 Jan 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-4p7m-87rg-hcph

## What is CVE-2021-24973?

CVE-2021-24973 is a medium-severity cross-site scripting vulnerability in Unknown Site Reviews, published on 3 Jan 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The Site Reviews WordPress plugin before 5.17.3 does not sanitise and escape the site-reviews parameter of the glsr_action AJAX action (available to unauthenticated and any authenticated users), allowing them to perform Cross-Site Scripting attacks against logged in admins viewing the Tool dashboard of the plugin

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

## Which versions are affected by CVE-2021-24973?

It affects 1 product.


Products: Geminilabs Site Reviews.

## How do I fix CVE-2021-24973?

No fix has been published for CVE-2021-24973 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24973 being exploited?

There is no known exploitation of CVE-2021-24973 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Site Reviews

- [CVE-2024-3050](https://insights.sbomify.com/CVE-2024-3050/): Site Reviews < 7.0.0 - IP Spoofing (critical 9.1)
- [CVE-2025-1232](https://insights.sbomify.com/CVE-2025-1232/): Site Reviews < 7.2.5 - Unauthenticated Stored XSS (high 8.8)
- [CVE-2023-27612](https://insights.sbomify.com/CVE-2023-27612/): WordPress Site Reviews Plugin <= 6.5.1 is vulnerable to Cross Site Scripting (XSS) (medium 6.5)
- [CVE-2023-27629](https://insights.sbomify.com/CVE-2023-27629/): WordPress Site Reviews Plugin <= 6.5.1 is vulnerable to Cross Site Scripting (XSS) (medium 6.5)
- [CVE-2022-46801](https://insights.sbomify.com/CVE-2022-46801/): WordPress Site Reviews Plugin <= 6.2.0 is vulnerable to CSV Injection (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24973 and fix it if it is affected.

What it is: CVE-2021-24973 is a medium-severity cross-site scripting vulnerability in Unknown Site Reviews, published on 3 Jan 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-24973 in the wild and no public exploit code.

Affected product: Unknown Site Reviews. 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-2021-24973/ (Markdown: https://insights.sbomify.com/CVE-2021-24973/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24973
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24973
- OSV: https://osv.dev/vulnerability/CVE-2021-24973

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24973/
Summaries are generated and may contain mistakes; the official description above is the record.