Cve20207796 Zimbra Collaboration Suite Full ((better)) | 100% BEST |

This last variant shows the devastating effect of combining individual vulnerabilities to create a more powerful exploit chain, often leading to full remote code execution (RCE).

All versions of Zimbra Collaboration Suite (ZCS) prior to 8.8.15 Patch 7 .

Ensure the Zimbra server cannot initiate unnecessary outbound connections to internal sensitive services.

Security Vulnerability Report: CVE-2020-7796 Target System: Synacor Zimbra Collaboration Suite (ZCS) Vulnerability Type: Server-Side Request Forgery (SSRF) Date of Vulnerability: Originally reported in late 2020; recently noted as actively exploited as of February 2026 1. Executive Summary CVE-2020-7796 cve20207796 zimbra collaboration suite full

Block URL patterns containing /service/home/~/*?*fmt=* and any parameter with <script , javascript: , onerror= , etc.

For detailed technical guidance, it is recommended to review the official security updates from Zimbra . Summary Table CVE-2020-7796 Component WebEx Zimlet Vulnerability Type SSRF (Server-Side Request Forgery) Affected Versions ZCS < 8.8.15 Patch 7 Severity High/Critical (Depending on environment) Remediation Patch to 8.8.15 P7+

Interestingly, the official fix for this vulnerability in Zimbra 8.8.15 Patch 7 was remarkably simple: the httpPost.jsp file was removed. According to a Zimbra forum post, "patch7 simply removes this file via RPM postinstall scriptlet: rm -f /opt/zimbra/zimlets-deployed/com_zimbra_webex/httpPost.jsp ". This underscores the fact that the vulnerable endpoint was a leftover, unnecessary file, making its complete removal the most effective remediation. This last variant shows the devastating effect of

: Insufficient validation of user-supplied URLs in a leftover JSP file ( httpPost.jsp ) within the WebEx zimlet. Technical Impact & Risks

In some scenarios, it may be possible to steal login credentials or inject malware through chained exploits. Current Threat Status

This article provides a comprehensive, in-depth analysis of this critical flaw. We will dissect its technical workings, assess its real-world impact, and provide a definitive guide for detection, mitigation, and remediation. By the end, you will have a complete understanding of this high-stakes vulnerability and the necessary steps to protect your infrastructure. Verification: After patching

If patching isn't immediately possible, implement network-level controls to restrict outbound connections from the Zimbra server to only essential destinations. Verification: After patching, use the zmcontrol -v command to verify your current patch level.

: SSRF can be used to scan internal networks, steal sensitive metadata, or access configuration files. No Authentication Required