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System Status: Operational
All tags
5 articles

#Zimbra

All CosmicBytez Labs articles tagged #Zimbra, across news, security advisories, how-to guides, and projects.

  • NewsJul 23, 2026

    Russian Laundry Bear Exploited Zimbra Zero-Day to Steal Mail and 2FA Codes

    A Russian state-sponsored espionage group spent months silently reading Western mailboxes through a zero-click XSS flaw in Zimbra's webmail client — stealing emails, 2FA tokens, and backup scratch codes that bypassed MFA resets.

  • NewsJul 11, 2026

    Critical Zimbra Flaw Could Let Crafted Emails Run Malicious Code in User Sessions

    A critical stored XSS vulnerability in Zimbra's Classic Web Client allows attackers to deliver specially crafted emails that execute arbitrary code within...

  • NewsJul 10, 2026

    Zimbra Urges Customers to Patch Critical Web Client XSS Flaw Exploited in the Wild

    CVE-2025-27915, a stored XSS vulnerability in Zimbra's Classic Web Client, was exploited as a zero-day before public disclosure. Attackers used malicious...

  • NewsApr 26, 2026

    Over 10,000 Zimbra Servers Vulnerable to Ongoing XSS Attacks

    CISA has confirmed that a cross-site scripting vulnerability in Zimbra Collaboration Suite is being actively exploited in the wild, with over 10,000...

  • NewsMar 19, 2026

    CISA Adds Zimbra XSS and SharePoint RCE to KEV; Cisco FMC

    CISA added actively exploited Zimbra Collaboration Suite and Microsoft SharePoint vulnerabilities to its Known Exploited Vulnerabilities catalog on March...