# CVE-2021-25082: Popup Builder < 4.0.7 - LFI to RCE

> An attacker can exploit a Local File Inclusion vulnerability in the Popup Builder plugin to achieve Remote Code Execution via PHAR wrappers.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:** 21 Feb 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-rgh6-hx6g-h7q7

## What is CVE-2021-25082?

CVE-2021-25082 is a high-severity path traversal vulnerability in Unknown Popup Builder – Create highly converting, mobile friendly marketing popups., published on 21 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Popup Builder WordPress plugin before 4.0.7 does not validate and sanitise the sgpb_type parameter before using it in a require statement, leading to a Local File Inclusion issue. Furthermore, since the beginning of the string can be controlled, the issue can lead to RCE vulnerability via wrappers such as PHAR

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2021-25082?

It affects 1 product.


Products: Sygnoos Popup Builder.

## How do I fix CVE-2021-25082?

No fix has been published for CVE-2021-25082 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-25082 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-25082 exists.

Public exploit code:

- WordPress Popup Builder < 4.0.7 - Remote Code Execution (nuclei): http/cves/2021/CVE-2021-25082.yaml

## Other vulnerabilities in Unknown Popup Builder – Create highly converting, mobile friendly marketing popups.

- [CVE-2022-0479](https://insights.sbomify.com/CVE-2022-0479/): Popup Builder < 4.1.1 - SQL Injection to Reflected Cross-Site Scripting (critical 9.8)
- [CVE-2020-9006](https://insights.sbomify.com/CVE-2020-9006/): SQL injection in n/a (critical 9.8)
- [CVE-2019-14695](https://insights.sbomify.com/CVE-2019-14695/): SQL injection in n/a (critical 9.8)
- [CVE-2023-6696](https://insights.sbomify.com/CVE-2023-6696/): Missing authorization in Popup Builder – Create highly converting, mobile friendly marketing popups. (high 8.1)
- [CVE-2023-6294](https://insights.sbomify.com/CVE-2023-6294/): popup-builder < 4.2.6 - Admin+ SSRF & File Read (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25082 and fix it if it is affected.

What it is: CVE-2021-25082 is a high-severity path traversal vulnerability in Unknown Popup Builder – Create highly converting, mobile friendly marketing popups., published on 21 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-25082 exists.

Affected product: Unknown Popup Builder – Create highly converting, mobile friendly marketing popups.. 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-2021-25082/ (Markdown: https://insights.sbomify.com/CVE-2021-25082/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25082
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25082
- OSV: https://osv.dev/vulnerability/CVE-2021-25082

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-25082/
Summaries are generated and may contain mistakes; the official description above is the record.