# CVE-2018-13065: Cross-site scripting in n/a

> ModSecurity allows XSS via IMG onerror attributes, primarily affecting environments without a Core Rule Set configured.

- **Severity:** Medium 6.1 (`CVSS:3.0/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:** 3 Jul 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-p6wp-wgv9-7657

## What is CVE-2018-13065?

CVE-2018-13065 is a medium-severity cross-site scripting vulnerability in n/a, published on 3 Jul 2018. 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

ModSecurity 3.0.0 has XSS via an onerror attribute of an IMG element. NOTE: a third party has disputed this issue because it may only apply to environments without a Core Rule Set configured

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

## Which versions are affected by CVE-2018-13065?

It affects 1 product.


Products: Owasp Modsecurity.

## How do I fix CVE-2018-13065?

No fix has been published for CVE-2018-13065 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-13065 being exploited?

There is no known exploitation of CVE-2018-13065 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2026-52747](https://insights.sbomify.com/CVE-2026-52747/): Security feature bypass in ModSecurity (high 8.6)
- [CVE-2024-1019](https://insights.sbomify.com/CVE-2024-1019/): WAF bypass of the ModSecurity v3 release line (high 8.6)
- [CVE-2026-42268](https://insights.sbomify.com/CVE-2026-42268/): ModSecurity: Unsigned integer underflow in @verifySSN / @verifyCPF / @verifySVNR operators (high 8.2)
- [CVE-2026-30923](https://insights.sbomify.com/CVE-2026-30923/): libModSecurity3 denial of service via segfault when using t:hexDecode on single-character query strings (high 8.2)
- [CVE-2025-48866](https://insights.sbomify.com/CVE-2025-48866/): ModSecurity has possible DoS vulnerability in sanitiseArg action (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-13065 and fix it if it is affected.

What it is: CVE-2018-13065 is a medium-severity cross-site scripting vulnerability in n/a, published on 3 Jul 2018. 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-2018-13065 in the wild and no public exploit code.

Affected product: n/a. 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-2018-13065/ (Markdown: https://insights.sbomify.com/CVE-2018-13065/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-13065
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-13065
- OSV: https://osv.dev/vulnerability/CVE-2018-13065

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-13065/
Summaries are generated and may contain mistakes; the official description above is the record.