# CVE-2020-35938: Deserialization in n/a

> Remote authenticated attackers can execute arbitrary code via insecure deserialization in the Post Grid WordPress plugin.

- **Severity:** High 7.5 (`CVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:L/S:U/UI:N`)
- **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:** 1 Jan 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-gpmw-c588-4p7h

## What is CVE-2020-35938?

CVE-2020-35938 is a high-severity unsafe deserialization vulnerability in n/a, published on 1 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

PHP Object injection vulnerabilities in the Post Grid plugin before 2.0.73 for WordPress allow remote authenticated attackers to inject arbitrary PHP objects due to insecure unserialization of data supplied in a remotely hosted crafted payload in the source parameter via AJAX. The action must be set to post_grid_import_xml_layouts.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2020-35938?

It affects 2 products.


Products: Pickplugins Post Grid, Pickplugins Team Showcase.

## How do I fix CVE-2020-35938?

No fix has been published for CVE-2020-35938 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-35938 being exploited?

There is no known exploitation of CVE-2020-35938 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-4450](https://insights.sbomify.com/CVE-2021-4450/): Post Grid <= 2.1.12 - Contributor+ SQL Injection (high 8.8)
- [CVE-2024-8253](https://insights.sbomify.com/CVE-2024-8253/): Post Grid and Gutenberg Blocks 2.2.87 - 2.2.90 - Authenticated (Subscriber+) Privilege Escalation (high 8.8)
- [CVE-2024-13408](https://insights.sbomify.com/CVE-2024-13408/): Path traversal in Post Grid, Slider & Carousel Ultimate – with Shortcode, Gutenberg Block & Elementor Widget (high 7.5)
- [CVE-2020-35936](https://insights.sbomify.com/CVE-2020-35936/): Cross-site scripting in n/a (high 7.5)
- [CVE-2020-35937](https://insights.sbomify.com/CVE-2020-35937/): Cross-site scripting in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-35938 and fix it if it is affected.

What it is: CVE-2020-35938 is a high-severity unsafe deserialization vulnerability in n/a, published on 1 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-35938 in the wild and no public exploit code.

Affected product: n/a. 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-2020-35938/ (Markdown: https://insights.sbomify.com/CVE-2020-35938/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-35938
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-35938
- OSV: https://osv.dev/vulnerability/CVE-2020-35938

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-35938/
Summaries are generated and may contain mistakes; the official description above is the record.