# CVE-2026-19985: Relevanssi <= 4.28.1 - Reflected Cross-Site Scripting

> Unauthenticated attackers can inject arbitrary scripts via crafted links if the plugin's debugging mode is enabled, leading to potential session hijacking or malicious actions.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 11 Sep 2026
- **Updated:** 11 Sep 2026
- **Also known as:** GHSA-342h-68mm-3pfr

## What is CVE-2026-19985?

CVE-2026-19985 is a medium-severity cross-site scripting vulnerability in comesio Relevanssi – A Better Search, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The Relevanssi – A Better Search plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 4.28.1 via the 's', 'post_types', and 'orderby' request parameters. This is due to insufficient input sanitization and output escaping in the relevanssi_debug_array() function in lib/debug.php, which dumps user-supplied query variables through print_r() inside a <pre> block without HTML escaping. The debug path is enabled by supplying the relevanssi_debug=on request parameter when the administrator has previously enabled the 'Debugging mode' setting; the gate itself is a configuration check with no capability, nonce, or logged-in check (the vendor explicitly suppresses nonce verification on that line). This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a specially crafted link.

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

## Which versions are affected by CVE-2026-19985?


## How do I fix CVE-2026-19985?

No fix has been published for CVE-2026-19985 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19985 being exploited?

There is no known exploitation of CVE-2026-19985 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19985 and fix it if it is affected.

What it is: CVE-2026-19985 is a medium-severity cross-site scripting vulnerability in comesio Relevanssi – A Better Search, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-19985 in the wild and no public exploit code.

Affected product: comesio Relevanssi – A Better Search. 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-2026-19985/ (Markdown: https://insights.sbomify.com/CVE-2026-19985/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19985
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19985
- OSV: https://osv.dev/vulnerability/CVE-2026-19985

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-19985/
Summaries are generated and may contain mistakes; the official description above is the record.