# CVE-2021-24761: Error Log Viewer < 1.1.2 - Arbitrary Text File Deletion via CSRF

> Attackers can trick admins into deleting arbitrary text files via CSRF due to missing nonce checks and path traversal prevention.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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:** 1 Feb 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-hf7c-m9qj-7hvq

## What is CVE-2021-24761?

CVE-2021-24761 is a medium-severity vulnerability in Unknown Error Log Viewer by BestWebSoft, published on 1 Feb 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 Error Log Viewer WordPress plugin before 1.1.2 does not perform nonce check when deleting a log file and does not have path traversal prevention, which could allow attackers to make a logged in admin delete arbitrary text files on the web server.

Weakness: CWE-352 (Cross-Site Request Forgery), CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2021-24761?

It affects 1 product.


Products: Bestwebsoft Error Log Viewer.

## How do I fix CVE-2021-24761?

No fix has been published for CVE-2021-24761 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24761 being exploited?

There is no known exploitation of CVE-2021-24761 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Error Log Viewer by BestWebSoft

- [CVE-2023-6821](https://insights.sbomify.com/CVE-2023-6821/): Error Log Viewer < 1.1.3 - Directory Listing to Sensitive Data Exposure (medium 6.5)
- [CVE-2017-18562](https://insights.sbomify.com/CVE-2017-18562/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2021-24966](https://insights.sbomify.com/CVE-2021-24966/): Error Log Viewer Plugin <= 1.1.1 - Admin+ Arbitrary File Clearing (medium 4.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24761 and fix it if it is affected.

What it is: CVE-2021-24761 is a medium-severity vulnerability in Unknown Error Log Viewer by BestWebSoft, published on 1 Feb 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-2021-24761 in the wild and no public exploit code.

Affected product: Unknown Error Log Viewer 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-2021-24761/ (Markdown: https://insights.sbomify.com/CVE-2021-24761/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24761
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24761
- OSV: https://osv.dev/vulnerability/CVE-2021-24761

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24761/
Summaries are generated and may contain mistakes; the official description above is the record.