Browser Security

Roundcube Webmail XSS Flaw Enables Email Account Takeover

Nishant Sharma

03 Jan 2026 — 1 min read

This newsletter is AI generated and may hallucinate sometimes 😊

A cross-site scripting (XSS) vulnerability was reported in Roundcube Webmail, which allows attackers to take over user email accounts.
The flaw enables an attacker to compromise accounts by sending a specially crafted email message that, when viewed, executes arbitrary code within the victim's browser.
Successful exploitation grants the attacker full access to the victim's email account, potentially leading to further sensitive data exposure and system compromise.

Source: Security.nl | Date: January 25, 2026

References

Roundcube Webmail XSS-lek laat aanvaller e-mailaccounts overnemen - Security.nl

Critical Copilot Prompt Injection Exposes Browser Data

This newsletter is AI generated and may hallucinate sometimes 😊 New One-Click Microsoft Copilot Vulnerability Grants Attackers Access to Sensitive Data * A "Reprompt" vulnerability in Microsoft Copilot allows attackers to exfiltrate sensitive user data with a single click via prompt injection techniques. * The flaw exploits browser-integrated AI, manipulating the

Browser Security Updates: Skimming, Chrome Extension, SmartScreen

This newsletter is AI generated and may hallucinate sometimes 😊 Long-Running Web Skimming Campaign Targets Online Checkout Pages * A persistent web skimming campaign, active for over two years, has been identified, targeting online e-commerce checkout pages to steal payment card information. * Attackers inject malicious JavaScript code into legitimate websites, which intercepts

Browser Security Brief: Web-Based LLM Attacks & Prompt Injection Campaigns

This newsletter is AI generated and may hallucinate sometimes 😊 Widespread Campaign Exploits LLMs Through Web-Based Prompt Injection * Threat actors are conducting widespread campaigns exploiting Large Language Models (LLMs) through techniques like prompt injection, data exfiltration, and model manipulation. * These attacks frequently leverage web application interfaces, using browsers as the primary

New 'Greatness' Phishing Platform Targets M365 Users in Browser Attacks

This newsletter is AI generated and may hallucinate sometimes 😊 New 'Greatness' Phishing-as-a-Service Platform Emerges Targeting Microsoft 365 Users * The "Greatness" Phishing-as-a-Service (PhaaS) platform is actively being offered to threat actors, providing advanced phishing kits to facilitate credential harvesting. * This platform specifically targets Microsoft 365 users, employing

References

Read more

Critical Copilot Prompt Injection Exposes Browser Data

Browser Security Updates: Skimming, Chrome Extension, SmartScreen

Browser Security Brief: Web-Based LLM Attacks & Prompt Injection Campaigns

New 'Greatness' Phishing Platform Targets M365 Users in Browser Attacks