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Bleeping Computer
The Zimbra security team urged customers to patch a critical vulnerability affecting the Classic Web Client used to access the Zimbra Collaboration suite. [...]
The Hacker News
Zimbra is urging customers to apply updates to address a critical security vulnerability impacting the Classic Web Client that could result in arbitrary code execution. The vulnerability has been described as a case of stored cross-site scripting (XSS) that could allow specially crafted emails to execute malicious scripts in a user's session. It has yet to be assigned a CVE identifier. "The
The Hacker News
A now patched security vulnerability in Zimbra Collaboration was exploited as a zero-day earlier this year in cyber attacks targeting the Brazilian military. Tracked as CVE-2025-27915 (CVSS score: 5.4), the vulnerability is a stored cross-site scripting (XSS) vulnerability in the Classic Web Client that arises as a result of insufficient sanitization of HTML content in ICS calendar files,
Bleeping Computer
Internet intelligence firm GreyNoise reports that it has recorded a significant spike in scanning activity consisting of nearly 1,971 IP addresses probing Microsoft Remote Desktop Web Access and RDP Web Client authentication portals in unison, suggesting a coordinated reconnaissance campaign. [...]
Bleeping Computer
Hackers are actively exploiting an unpatched remote code execution (RCE) vulnerability in Zimbra Collaboration Suite (ZCS), a widely deployed web client and email server. [...]
The Register
Code Verify tool confers with Cloudflare to warn of any shenanigans WhatsApp and Cloudflare have teamed up to provide desktop users of WhatsApp's web client with a browser extension called Code Verify that checks the integrity of the software running in their browser.…