---
title: "“CrossBarking” — Exploiting a 0-Day Opera Vulnerability with a Cross-Browser Extension Store Attack"
url: https://daily.dev/posts/crossbarking-exploiting-a-0-day-opera-vulnerability-with-a-cross-browser-extension-store-attack-xgfztceqj
source_url: https://medium.com/@guardiosecurity/crossbarking-exploiting-a-0-day-opera-vulnerability-with-a-cross-browser-extension-store-attack-db3e6d6e6aa8
type: article
source: "Guardio"
published: 2024-10-30T13:31:00.417Z
updated: 2024-12-11T14:57:01.637Z
tags: ["cyber"]
reading_time: 16
upvotes: 0
comments: 0
language: en
---

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# “CrossBarking” — Exploiting a 0-Day Opera Vulnerability with a Cross-Browser Extension Store Attack

**[Guardio](https://daily.dev/sources/guardio)** · 16 min read · 0 upvotes · 0 comments

## Summary

Guardio Labs has identified and disclosed a serious Opera browser vulnerability, allowing malicious extensions to exploit Private APIs and perform actions such as screen capturing, browser setting changes, and account hijacking. This vulnerability can be exploited across different extension stores, as demonstrated via a malicious extension that bypassed security measures and was accepted into Google's Chrome Store. The case emphasizes the need for stringent review processes and continuous post-approval monitoring to safeguard against such threats.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://medium.com/@guardiosecurity/crossbarking-exploiting-a-0-day-opera-vulnerability-with-a-cross-browser-extension-store-attack-db3e6d6e6aa8>

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---

Tags: [#cyber](https://daily.dev/tags/cyber)

[View this post on daily.dev](https://daily.dev/posts/crossbarking-exploiting-a-0-day-opera-vulnerability-with-a-cross-browser-extension-store-attack-xgfztceqj)