Cve20207796 Zimbra Collaboration Suite Full [patched] -

Official remediation steps and release notes are available on the Zimbra Wiki Security Center CVE-2020-7796 Detail - NVD 18 Feb 2026 —

When an unauthenticated remote attacker sends a specially crafted HTTP POST request to the vulnerable JSP endpoint, the application processes the untrusted URL input blindly. Rather than rejecting the input, the underlying server acts as a proxy, executing HTTP requests to destinations chosen entirely by the attacker. Architectural Impact: How SSRF Weaponizes the Mail Server

Furthermore, a public Proof-of-Concept (PoC) exploit is available on GitHub, making it trivial for even novice attackers to develop a weaponized exploit. This combination of active exploitation, public PoC, and high severity makes this vulnerability a clear and present danger.

The vulnerability exists in the way Zimbra Drive processes file metadata. When a user or an attacker uploads a file with a malicious payload in the filename, the system fails to properly escape the characters before rendering them in the web interface. cve20207796 zimbra collaboration suite full

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Attackers can bypass firewalls to access sensitive internal resources or information.

Despite being originally identified in 2020, CVE-2020-7796 has seen a massive resurgence in activity. Security researchers observed a significant spike in exploitation attempts in early 2026, with nearly targeting the flaw globally. This surge prompted CISA to mandate federal agencies to apply fixes by March 10, 2026 . Remediation and Mitigation CVE-2020-7796 Detail - NVD Official remediation steps and release notes are available

: Limit outbound connections from the Zimbra server to only essential destinations.

The Zimbra Collaboration Suite, a popular open-source email and collaboration platform, has been vulnerable to a critical security flaw, known as CVE-2020-7796. This vulnerability affects the full suite, exposing millions of users worldwide to potential cyber threats. In this article, we will explore the details of the vulnerability, its impact, and the necessary steps to mitigate the risks.

All Zimbra Collaboration Suite (ZCS) versions prior to 8.8.15 Patch 7 . This combination of active exploitation, public PoC, and

💡 CVE-2020-7796 highlights the importance of input validation in collaborative tools. For modern enterprises, keeping the Zimbra Collaboration Suite updated is the single most effective way to prevent exploitation of known vulnerabilities. If you'd like, I can help you with:

Attackers can map out an organization's internal network structure.

The severity of CVE-2020-7796 is designated as , earning a high position on threat prioritization scales. Given that hundreds of thousands of organizations globally rely on Zimbra Server Architecture for handling communication, its exploitation can destabilize business continuity. Impact Vector Threat Details Authentication Requirement

In the case of Zimbra Collaboration Suite, this SSRF vulnerability resides in the . Zimlets are small, feature-enhancing applications that integrate external services into the Zimbra web client.

The vulnerability is specifically linked to the WebEx Zimlet ( com_zimbra_webex ) when the Zimlet JSP functionality is enabled.