# CVE-2017-20041: Ucweb UC Browser HTML URL improper restriction of rendered ui layers

> Attackers can bypass UI restrictions in UC Browser via crafted HTML titles, potentially enabling clickjacking or spoofing attacks.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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:** 13 Jun 2022
- **Updated:** 15 Apr 2025
- **Also known as:** GHSA-74ch-7rh8-763r

## What is CVE-2017-20041?

CVE-2017-20041 is a medium-severity vulnerability in Ucweb UC Browser, published on 13 Jun 2022. 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

A vulnerability was found in Ucweb UC Browser 11.2.5.932. It has been classified as critical. Affected is an unknown function of the component HTML Handler. The manipulation of the argument title leads to improper restriction of rendered ui layers (URL). It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-1021 (Improper Restriction of Rendered UI Layers or Frames)

## Which versions are affected by CVE-2017-20041?

It affects 1 product.


Products: Ucweb Uc Browser.

## How do I fix CVE-2017-20041?

No fix has been published for CVE-2017-20041 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-20041 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-20041 exists.

## Other vulnerabilities in Ucweb UC Browser

- [CVE-2019-10250](https://insights.sbomify.com/CVE-2019-10250/): Other in n/a (medium 5.9)
- [CVE-2019-10251](https://insights.sbomify.com/CVE-2019-10251/): Information disclosure in n/a (medium 5.9)
- [CVE-2020-7363](https://insights.sbomify.com/CVE-2020-7363/): UCWeb UC Browser Address Bar Spooofing (medium 4.3)
- [CVE-2020-7364](https://insights.sbomify.com/CVE-2020-7364/): UCWeb UC Browser Address Bar Spooofing (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-20041 and fix it if it is affected.

What it is: CVE-2017-20041 is a medium-severity vulnerability in Ucweb UC Browser, published on 13 Jun 2022. 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-2017-20041 exists.

Affected product: Ucweb UC 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-2017-20041/ (Markdown: https://insights.sbomify.com/CVE-2017-20041/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-20041
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-20041
- OSV: https://osv.dev/vulnerability/CVE-2017-20041

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-20041/
Summaries are generated and may contain mistakes; the official description above is the record.