# CVE-2026-5361: Envira Gallery <= 1.12.4 - Authenticated (Author+) Stored Cross-Site Scripting via 'arrows' Parameter

> Authenticated attackers can inject arbitrary scripts via the arrows parameter, leading to stored XSS execution on victim pages.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 14 May 2026
- **Updated:** 14 May 2026
- **Also known as:** GHSA-fm2p-2whf-w32j

## What is CVE-2026-5361?

CVE-2026-5361 is a medium-severity cross-site scripting vulnerability in smub Envira Gallery – Image Photo Gallery, Albums, Video Gallery, Slideshows & More, published on 14 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Envira Gallery Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in versions up to and including 1.12.4. This is due to insufficient input sanitization in the update_gallery_data() function and improper output escaping in the gallery_init() function. The sanitize_config_values() function only sanitizes the justified_gallery_theme and justified_row_height parameters, but does not sanitize the arrows parameter. When the arrows value is output in the inline JavaScript configuration, it uses esc_attr() which is designed for HTML attribute contexts, not JavaScript contexts, allowing JavaScript expression injection. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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

## Which versions are affected by CVE-2026-5361?


## How do I fix CVE-2026-5361?

No fix has been published for CVE-2026-5361 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5361 being exploited?

There is no known exploitation of CVE-2026-5361 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5361 and fix it if it is affected.

What it is: CVE-2026-5361 is a medium-severity cross-site scripting vulnerability in smub Envira Gallery – Image Photo Gallery, Albums, Video Gallery, Slideshows & More, published on 14 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-5361 in the wild and no public exploit code.

Affected product: smub Envira Gallery – Image Photo Gallery, Albums, Video Gallery, Slideshows & More. 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-2026-5361/ (Markdown: https://insights.sbomify.com/CVE-2026-5361/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5361
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5361
- OSV: https://osv.dev/vulnerability/CVE-2026-5361

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-5361/
Summaries are generated and may contain mistakes; the official description above is the record.