# CVE-2023-3746: ActivityPub for WordPress < 1.0.1 - Contributor+ Stored XSS

> Contributors can inject malicious scripts via post content in the ActivityPub plugin, leading to stored XSS attacks against other users.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 16 Oct 2023
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-32jc-368c-fvg6

## What is CVE-2023-3746?

CVE-2023-3746 is a medium-severity cross-site scripting vulnerability in Unknown ActivityPub, published on 16 Oct 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The ActivityPub WordPress plugin before 1.0.0 does not sanitize and escape some data from post content, which could allow contributor and above role to perform Stored Cross-Site Scripting attacks

## Which versions are affected by CVE-2023-3746?

It affects 1 product.


Products: Automattic Activitypub.

## How do I fix CVE-2023-3746?

No fix has been published for CVE-2023-3746 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-3746 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-3746 exists.

## Other vulnerabilities in Unknown ActivityPub

- [CVE-2026-4338](https://insights.sbomify.com/CVE-2026-4338/): ActivityPub Routing < 8.0.2 - Unauthenticated Drafts/Scheduled/Pending Posts Disclosure (high 7.5)
- [CVE-2023-5057](https://insights.sbomify.com/CVE-2023-5057/): ActivityPub for WordPress < 1.0.0 - Contributor+ Stored XSS (medium 5.4)
- [CVE-2023-3706](https://insights.sbomify.com/CVE-2023-3706/): ActivityPub for WordPress < 1.0.0 - Subscriber+ Arbitrary Post Title Disclosure (medium 4.3)
- [CVE-2023-3707](https://insights.sbomify.com/CVE-2023-3707/): ActivityPub for WordPress < 1.0.0 - Subscriber+ Arbitrary Post Content Disclosure (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-3746 and fix it if it is affected.

What it is: CVE-2023-3746 is a medium-severity cross-site scripting vulnerability in Unknown ActivityPub, published on 16 Oct 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-3746 exists.

Affected product: Unknown ActivityPub. 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-2023-3746/ (Markdown: https://insights.sbomify.com/CVE-2023-3746/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-3746
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3746
- OSV: https://osv.dev/vulnerability/CVE-2023-3746

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-3746/
Summaries are generated and may contain mistakes; the official description above is the record.