# CVE-2021-23253: Other in Opera Mini for Android

> Opera Mini for Android displays URLs left-aligned, allowing attackers to spoof domains by hiding the true TLD, facilitating phishing attacks.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Jan 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-prpx-5phw-fx4m

## What is CVE-2021-23253?

CVE-2021-23253 is a medium-severity vulnerability in Opera Mini for Android, published on 11 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Opera Mini for Android below 53.1 displays URL left-aligned in the address field. This allows a malicious attacker to craft a URL with a long domain name, e.g. www.safe.opera.com.attacker.com. With the URL being left-aligned, the user will only see the front part (e.g. www.safe.opera.com…) The exact amount depends on the phone screen size but the attacker can craft a number of different domains and target different phones. Starting with version 53.1 Opera Mini displays long URLs with the top-level domain label aligned to the right of the address field which mitigates the issue.

## Which versions are affected by CVE-2021-23253?

It affects 1 product.


Products: Opera Opera Mini.

## How do I fix CVE-2021-23253?

No fix has been published for CVE-2021-23253 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-23253 being exploited?

There is no known exploitation of CVE-2021-23253 in the wild and no public exploit code.

## Other vulnerabilities in Opera Mini for Android

- [CVE-2018-16135](https://insights.sbomify.com/CVE-2018-16135/): Security feature bypass in n/a (medium 6.5)
- [CVE-2012-5180](https://insights.sbomify.com/CVE-2012-5180/): Information disclosure in n/a (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-23253 and fix it if it is affected.

What it is: CVE-2021-23253 is a medium-severity vulnerability in Opera Mini for Android, published on 11 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-23253 in the wild and no public exploit code.

Affected product: Opera Mini for Android. 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-2021-23253/ (Markdown: https://insights.sbomify.com/CVE-2021-23253/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-23253
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-23253
- OSV: https://osv.dev/vulnerability/CVE-2021-23253

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-23253/
Summaries are generated and may contain mistakes; the official description above is the record.