# CVE-2018-25331: Zenar Content Management System Cross-Site Scripting via ajax.php

> Unauthenticated attackers can inject malicious scripts via the current_page parameter in ajax.php, leading to arbitrary JavaScript execution in victim browsers.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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:** 17 May 2026
- **Updated:** 24 May 2026
- **Also known as:** GHSA-q3m7-9pg6-jjh6

## What is CVE-2018-25331?

CVE-2018-25331 is a medium-severity cross-site scripting vulnerability in Zenar Content Management System, published on 17 May 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

Zenar Content Management System contains a cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by manipulating form parameters in POST requests. Attackers can inject script tags through the current_page parameter sent to the ajax.php endpoint, which reflects unsanitized user input in the response HTML to execute arbitrary JavaScript in victim browsers.

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

## Which versions are affected by CVE-2018-25331?


## How do I fix CVE-2018-25331?

No fix has been published for CVE-2018-25331 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-25331 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25331 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-25331 and fix it if it is affected.

What it is: CVE-2018-25331 is a medium-severity cross-site scripting vulnerability in Zenar Content Management System, published on 17 May 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25331 exists.

Affected product: Zenar Content Management System. 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-2018-25331/ (Markdown: https://insights.sbomify.com/CVE-2018-25331/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-25331
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-25331
- OSV: https://osv.dev/vulnerability/CVE-2018-25331

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-25331/
Summaries are generated and may contain mistakes; the official description above is the record.