# CVE-2021-47951: WordPress Picture Gallery 1.4.2 Stored XSS via Edit Content URL

> Authenticated attackers can inject malicious scripts via the Edit Content URL field in the Picture Gallery plugin, leading to session hijacking or credential theft.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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:** 10 May 2026
- **Updated:** 24 May 2026
- **Also known as:** GHSA-w363-59mc-25wh

## What is CVE-2021-47951?

CVE-2021-47951 is a medium-severity cross-site scripting vulnerability in picture-gallery Picture Gallery, published on 10 May 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

WordPress Picture Gallery 1.4.2 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts through the Edit Content URL field in the Access Control settings. Attackers can enter JavaScript payloads in the plugin options that are stored in the database and executed when the functionality is triggered, enabling session hijacking or credential theft.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-47951?


## How do I fix CVE-2021-47951?

No fix has been published for CVE-2021-47951 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47951 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47951 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-47951 and fix it if it is affected.

What it is: CVE-2021-47951 is a medium-severity cross-site scripting vulnerability in picture-gallery Picture Gallery, published on 10 May 2026. 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-2021-47951 exists.

Affected product: picture-gallery Picture Gallery. 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-2021-47951/ (Markdown: https://insights.sbomify.com/CVE-2021-47951/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47951
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47951
- OSV: https://osv.dev/vulnerability/CVE-2021-47951

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-47951/
Summaries are generated and may contain mistakes; the official description above is the record.