# CVE-2022-28678: Use after free in PDF Reader

> Remote attackers can execute arbitrary code by tricking users into opening malicious PDF files in Foxit PDF Reader.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Jul 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-q786-p393-rw6q

## What is CVE-2022-28678?

CVE-2022-28678 is a high-severity use after free vulnerability in Foxit Pdf Editor, published on 18 Jul 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.2.1.53537. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of Doc objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-16805.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2022-28678?

It affects 2 products.


Products: Foxit Pdf Editor, Foxit Pdf Reader.

## How do I fix CVE-2022-28678?

No fix has been published for CVE-2022-28678 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-28678 being exploited?

There is no known exploitation of CVE-2022-28678 in the wild and no public exploit code.

## Other vulnerabilities in Foxit Pdf Editor

- [CVE-2022-28104](https://insights.sbomify.com/CVE-2022-28104/): File upload in n/a (critical 9.8)
- [CVE-2022-24954](https://insights.sbomify.com/CVE-2022-24954/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-24955](https://insights.sbomify.com/CVE-2022-24955/): Other in n/a (critical 9.8)
- [CVE-2026-91798](https://insights.sbomify.com/CVE-2026-91798/): Foxit PDF Editor/Reader Updater Privilege Escalation (high 8.8)
- [CVE-2026-91800](https://insights.sbomify.com/CVE-2026-91800/): Foxit PDF Editor installer local privilege escalation (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-28678 and fix it if it is affected.

What it is: CVE-2022-28678 is a high-severity use after free vulnerability in Foxit Pdf Editor, published on 18 Jul 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2022-28678 in the wild and no public exploit code.

Affected product: Foxit Pdf Editor. 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-2022-28678/ (Markdown: https://insights.sbomify.com/CVE-2022-28678/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-28678
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-28678
- OSV: https://osv.dev/vulnerability/CVE-2022-28678

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-28678/
Summaries are generated and may contain mistakes; the official description above is the record.