# CVE-2021-24245: Stop Spammers < 2021.9 - Reflected Cross-Site Scripting (XSS)

> Reflected XSS in Stop Spammers plugin allows attackers to execute arbitrary scripts via unescaped user input in blocking requests.

- **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:** 5 May 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-7vc8-gc65-8vpf

## What is CVE-2021-24245?

CVE-2021-24245 is a medium-severity cross-site scripting vulnerability in Trumani Stop Spammers, published on 5 May 2021. 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 Stop Spammers WordPress plugin before 2021.9 did not escape user input when blocking requests (such as matching a spam word), outputting it in an attribute after sanitising it to remove HTML tags, which is not sufficient and lead to a reflected Cross-Site Scripting issue.

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

## Which versions are affected by CVE-2021-24245?

It affects 1 product.


Products: Trumani Stop Spammers.

## How do I fix CVE-2021-24245?

No fix has been published for CVE-2021-24245 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24245 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24245 exists.

Public exploit code:

- WordPress Plugin Stop Spammers 2021.8 - 'log' Reflected Cross-site Scripting (XSS) (exploitdb)
- WordPress Stop Spammers <2021.9 - Cross-Site Scripting (nuclei): http/cves/2021/CVE-2021-24245.yaml

## Other vulnerabilities in Trumani Stop Spammers

- [CVE-2022-4120](https://insights.sbomify.com/CVE-2022-4120/): Stop Spammers Security < 2022.6 - Unauthenticated PHP Object Injection (critical 9.8)
- [CVE-2023-2488](https://insights.sbomify.com/CVE-2023-2488/): Stop Spammers Security < 2023 - Reflected XSS (medium 6.1)
- [CVE-2021-24517](https://insights.sbomify.com/CVE-2021-24517/): Stop Spammers Security < 2021.18 - Authenticated Stored XSS (medium 5.4)
- [CVE-2023-2489](https://insights.sbomify.com/CVE-2023-2489/): Stop Spammers Security < 2023 - Admin+ Stored XSS (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24245 and fix it if it is affected.

What it is: CVE-2021-24245 is a medium-severity cross-site scripting vulnerability in Trumani Stop Spammers, published on 5 May 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24245 exists.

Affected product: Trumani Stop Spammers. 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-2021-24245/ (Markdown: https://insights.sbomify.com/CVE-2021-24245/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24245
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24245
- OSV: https://osv.dev/vulnerability/CVE-2021-24245

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-24245/
Summaries are generated and may contain mistakes; the official description above is the record.