Cve20207796 Zimbra Collaboration Suite Full |top| 〈95% Latest〉

While the specific CVE number "2020-27996" may point to a different piece of software, the underlying threat it's often associated with—the critical path traversal vulnerability in the Zimbra Collaboration Suite—is one of the most serious to face enterprise email security in recent years. This is not a complex logic flaw but a straightforward failure to validate file paths during a routine operation: extracting email attachments.

The impact of this vulnerability is significant. A successful exploit can allow an attacker to:

Successful exploitation of CVE-2020-7796 can have devastating consequences for a business, including:

is a critical Server-Side Request Forgery (SSRF) vulnerability in Synacor Zimbra Collaboration Suite (ZCS) that allows unauthenticated remote attackers to force the server into making arbitrary HTTP requests. This flaw presents a severe security risk to enterprise environments, carrying a maximum CVSS v3.1 score of 9.8 (Critical) . cve20207796 zimbra collaboration suite full

Understanding this vulnerability is crucial for system administrators tasked with maintaining data sovereignty and security within their Zimbra infrastructure. What is CVE-2020-7796?

A proof-of-concept exploit has been publicly disclosed, demonstrating how an attacker can exploit the vulnerability to read sensitive files and execute system commands.

The weakness lies in the implementation of the integration in Zimbra versions prior to 8.8.15 Patch 7 . Zimlets are add-on components that extend the capabilities of the Zimbra web client. When the WebEx Zimlet is installed and its respective JavaServer Pages (JSP) configuration is enabled, a specific endpoint fails to perform sufficient input validation on user-supplied URLs. While the specific CVE number "2020-27996" may point

If an immediate upgrade is not possible, organizations should disable the WebEx Zimlet to mitigate the risk.

This is not just a theoretical risk. CISA (Cybersecurity and Infrastructure Security Agency) has confirmed active exploitation of CVE-2020-7796. Large-scale coordinated attacks have been observed, with threat intelligence firm GreyNoise reporting that over 400 unique IP addresses were simultaneously exploiting multiple SSRF vulnerabilities, including CVE-2020-7796, in a "coordinated surge". The vulnerability is considered "actively exploited in the wild".

By sending a specially crafted HTTP request to the vulnerable JSP file, an attacker forces the server to act as a proxy, making requests to other URLs on their behalf. Affected Versions Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 Remediation & Mitigation Administrators should prioritize the following actions: ZCS 8.8.15 Patch 7 A successful exploit can allow an attacker to:

Sensitive information from internal metadata services or local configuration files may be retrieved. Remote Code Execution (RCE): In some configurations, SSRF can be leveraged to gain full control over the affected system 3. Affected Versions Zimbra Collaboration Suite versions prior to 8.8.15 Patch 7 4. Risk Assessment Authentication: Not required (Unauthenticated). Exploitation Status:

To mitigate this vulnerability, administrators should:

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.

CVE-2020-7796 represents a serious risk for any organization running an unpatched version of Zimbra Collaboration Suite. With a critical CVSS score of 9.8 and confirmation of active exploitation, the window for remediation has long passed. Administrators must prioritize applying the official Patch 7 or a newer version immediately to prevent an unauthenticated attacker from abusing their email server to access internal networks and sensitive data.