# CVE-2018-18913: Other in n/a

> Attackers can execute arbitrary code and gain system control via DLL hijacking when a user opens a malicious HTML file in Opera.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 Mar 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-x7p4-c67j-9fvf

## What is CVE-2018-18913?

CVE-2018-18913 is a high-severity vulnerability in Opera Opera Browser, published on 21 Mar 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Opera before 57.0.3098.106 is vulnerable to a DLL Search Order hijacking attack where an attacker can send a ZIP archive composed of an HTML page along with a malicious DLL to the target. Once the document is opened, it may allow the attacker to take full control of the system from any location within the system. The issue lies in the loading of the shcore.dll and dcomp.dll files: these files are being searched for by the program in the same system-wide directory where the HTML file is executed.

Weakness: CWE-426 (Untrusted Search Path)

## Which versions are affected by CVE-2018-18913?

It affects 1 product.


Products: Opera Opera Browser.

## How do I fix CVE-2018-18913?

No fix has been published for CVE-2018-18913 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-18913 being exploited?

There is no known exploitation of CVE-2018-18913 in the wild and no public exploit code.

## Other vulnerabilities in Opera Opera Browser

- [CVE-2013-3211](https://insights.sbomify.com/CVE-2013-3211/): Unspecified vulnerability in Opera before 12.15 has unknown impact and attack vectors, related to a "moderately severe issue." (critical 10.0)
- [CVE-2012-4145](https://insights.sbomify.com/CVE-2012-4145/): Other in n/a (critical 10.0)
- [CVE-2012-3559](https://insights.sbomify.com/CVE-2012-3559/): Other in n/a (critical 10.0)
- [CVE-2012-3561](https://insights.sbomify.com/CVE-2012-3561/): Memory corruption in n/a (critical 10.0)
- [CVE-2011-4683](https://insights.sbomify.com/CVE-2011-4683/): Unspecified vulnerability in Opera before 11.60 has unknown impact and attack vectors, related to a "moderately severe issue." (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-18913 and fix it if it is affected.

What it is: CVE-2018-18913 is a high-severity vulnerability in Opera Opera Browser, published on 21 Mar 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-18913 in the wild and no public exploit code.

Affected product: Opera Opera Browser. 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-2018-18913/ (Markdown: https://insights.sbomify.com/CVE-2018-18913/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-18913
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-18913
- OSV: https://osv.dev/vulnerability/CVE-2018-18913

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-18913/
Summaries are generated and may contain mistakes; the official description above is the record.