# CVE-2021-24762: Perfect Survey < 1.5.2 - Unauthenticated SQL Injection

> Unauthenticated attackers can perform SQL injection via the question_id parameter in the Perfect Survey WordPress plugin, potentially accessing or modifying database contents.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Feb 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-mchv-2c9q-xfg9

## What is CVE-2021-24762?

CVE-2021-24762 is a critical SQL injection vulnerability in Unknown Perfect Survey, published on 1 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Perfect Survey WordPress plugin before 1.5.2 does not validate and escape the question_id GET parameter before using it in a SQL statement in the get_question AJAX action, allowing unauthenticated users to perform SQL injection.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2021-24762?

It affects 1 product.


Products: Getperfectsurvey Perfect Survey.

## How do I fix CVE-2021-24762?

No fix has been published for CVE-2021-24762 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24762 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24762 exists.

Public exploit code:

- This repo shows an exploit to CVE-2021-24762. This is an Blind SQLi exploit that, on default config, greps the admin password. (github_poc): https://github.com/c4cnm/Exploit_CVE-2021-24762
- WordPress Plugin Perfect Survey 1.5.1 SQLi (Unauthenticated) (metasploit)
- WordPress Plugin Perfect Survey - 1.5.1 - SQLi (Unauthenticated) (exploitdb)
- learning github (github_poc): https://github.com/NT1410/CVE-2021-24762
- WordPress Perfect Survey <1.5.2 - SQL Injection (nuclei): http/cves/2021/CVE-2021-24762.yaml

## Other vulnerabilities in Unknown Perfect Survey

- [CVE-2021-24763](https://insights.sbomify.com/CVE-2021-24763/): Perfect Survey < 1.5.2 - Unauthorised AJAX Call to Stored XSS / Survey Settings Update (high 8.8)
- [CVE-2021-24764](https://insights.sbomify.com/CVE-2021-24764/): Perfect Survey < 1.5.2 - Reflected Cross-Site Scripting (medium 6.1)
- [CVE-2021-24765](https://insights.sbomify.com/CVE-2021-24765/): Perfect Survey < 1.5.2 - Unauthenticated Stored Cross-Site Scripting (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24762 and fix it if it is affected.

What it is: CVE-2021-24762 is a critical SQL injection vulnerability in Unknown Perfect Survey, published on 1 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24762 exists.

Affected product: Unknown Perfect Survey. 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-2021-24762/ (Markdown: https://insights.sbomify.com/CVE-2021-24762/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24762
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24762
- OSV: https://osv.dev/vulnerability/CVE-2021-24762

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24762/
Summaries are generated and may contain mistakes; the official description above is the record.