# CVE-2021-25121: Rating by BestWebSoft < 1.6 - Rating Denial of Service

> An attacker can cause a Denial of Service on posts or pages by submitting long integer ratings due to lack of validation.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Jun 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-hg3r-jw9q-9wc4

## What is CVE-2021-25121?

CVE-2021-25121 is a medium-severity denial of service vulnerability in Unknown Rating by BestWebSoft, published on 20 Jun 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Rating by BestWebSoft WordPress plugin before 1.6 does not validate the submitted rating, allowing submission of long integer, causing a Denial of Service on the post/page when a user submit such rating

Weakness: CWE-191 (Integer Underflow (Wrap or Wraparound))

## Which versions are affected by CVE-2021-25121?

It affects 1 product.


Products: Bestwebsoft Rating.

## How do I fix CVE-2021-25121?

No fix has been published for CVE-2021-25121 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-25121 being exploited?

There is no known exploitation of CVE-2021-25121 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Rating by BestWebSoft

- [CVE-2017-18530](https://insights.sbomify.com/CVE-2017-18530/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25121 and fix it if it is affected.

What it is: CVE-2021-25121 is a medium-severity denial of service vulnerability in Unknown Rating by BestWebSoft, published on 20 Jun 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-25121 in the wild and no public exploit code.

Affected product: Unknown Rating by BestWebSoft. 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-2021-25121/ (Markdown: https://insights.sbomify.com/CVE-2021-25121/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25121
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25121
- OSV: https://osv.dev/vulnerability/CVE-2021-25121

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-25121/
Summaries are generated and may contain mistakes; the official description above is the record.