Attackers can map the internal network infrastructure behind the firewall.
The vulnerability carries a maximum , indicating low attack complexity and the absence of any authentication or user interaction requirements. The Root Cause
user wants a long article about CVE-2020-2796, a vulnerability in Zimbra Collaboration Suite. I need to gather detailed information about this CVE. I will follow the search plan provided in the hints. The plan includes two rounds of searches. Round One involves searching for general information, technical details, exploitation, and patches for CVE-2020-2796. Round Two involves deeper dives into NIST NVD, the official Zimbra advisory, exploitation proof-of-concepts, and the impact on different versions. I will start with Round One. search results for CVE-2020-2796 show some potentially relevant pages. Result 0 from acunetix.com appears to be about SSRF (CVE-2020-7796), which is a different CVE. Result 1 from secualive.jp might be in Japanese. Result 2 from app.opencve.io seems to be about a different CVE. Result 3 from LevelBlue might be about multiple CVEs. Result 4 from stack.watch might be about XSS. Result 5 from cve.spirity.io might be about XSS. Result 6 from cxsecurity.com might be about XSS. Result 7 from wiki.zimbra.com is about a patch. Result 8 from cve.netspider.io might be about XSS. The search for technical details returned result 0 from cybersecurity-help.cz, which seems to describe multiple vulnerabilities. The search for exploit PoC returned result 0 about a critical Zimbra vulnerability exploited one day after PoC release, but it doesn't specify CVE-2020-2796. The search for patch information returned result 0 from wiki.zimbra.com about security advisories, but it might not be specific. It seems that CVE-2020-2796 might not be well-documented. I suspect the user might have meant CVE-2020-7796, which is a known SSRF vulnerability in Zimbra. I will search for "CVE-2020-2796 Zimbra Collaboration Suite full exploit details" and "CVE-2020-2796 Zimbra analysis site:github.com" to see if there is any more specific information. search results for "CVE-2020-2796" show result 0 from vuldb.com, which might have some information. I will open it to see if it provides any details. page is about Oracle Email Center, not Zimbra. It seems CVE-2020-2796 might be associated with Oracle, not Zimbra. The user might have confused the CVE ID. The user's question mentions "cve20207796 zimbra collaboration suite full". It's possible they meant CVE-2020-7796, which is a known SSRF vulnerability in Zimbra. I'll proceed with that. I'll now gather information on CVE-2020-7796. I'll search for "CVE-2020-7796 Zimbra Collaboration Suite SSRF". will open the NVD entry for CVE-2020-7796. will also open the Zimbra release page for Patch 7 to see the fix details. will search for "CVE-2020-7796 exploit PoC" and "CVE-2020-7796 patch details". will open the CISA Known Exploited Vulnerabilities Catalog entry for CVE-2020-7796. NVD entry and the Zimbra release page for Patch 7 provide information about the CVE. I will also search for "CVE-2020-7796 SSRF WebEx zimlet". will open the vulnerability database entry from cybersecurity-help.cz., I will search for "CVE-2020-7796 technical details" and "CVE-2020-7796 writeup". will open the AttackerKB entry. will also search for "Zimbra SSRF CVE-2020-7796 proof of concept". will search for "CVE-2020-7796 Zimbra exploit code". will now search for "CVE-2020-7796 Zimbra SSRF writeup site:medium.com". will also search for "CVE-2020-7796 Zimbra SSRF internal". will open the Acunetix page. will also open the Zimbra forums page. will also open the Acunetix page from result 7. will also search for "CVE-2020-7796 Zimbra SSRF internal network". will open the CVE Daily page. have gathered information about CVE-2020-7796, which is likely the intended CVE. I will now write a long article based on the information I have collected. The article will cover the description, CVSS score, affected versions, technical details, exploitation, patch information, and mitigation steps. I will cite the sources I have found, including the NVD entry, the Zimbra release page, the Acunetix page, and the Zimbra forums. I will also mention the CISA KEV catalog and the potential impact. I will structure the article with an introduction, a detailed analysis, and a conclusion. I will use the information from the NVD entry (source 9), the Zimbra release page (source 10), the Acunetix page (source 23), the Zimbra forums (source 24), and the CISA KEV catalog (source 13). I will also reference the CVE-2020-7796 SSRF (source 8) and the cybersecurity-help.cz page (source 15). I will ensure that the article is informative and comprehensive.CVE-2020-7796: The Critical Zimbra Collaboration Suite SSRF Vulnerability**
The flaw is classified under . It stems from insufficient validation of user-supplied URLs within a core application endpoint. Specifically, the vulnerability triggers when: The WebEx Zimlet is installed on the ZCS system. The Zimlet JSP (JavaServer Pages) functionality is enabled. cve20207796 zimbra collaboration suite full
The flaw stems from insufficient input validation within a specific application component in the Zimbra platform. When a platform fails to sanitize user-supplied URLs, it allows an attacker to abuse the server as a proxy to make unintended outbound requests.
Successful exploitation allows attackers to bypass traditional network defenses like firewalls and gain access to restricted internal services. Key risks include:
Successful exploitation of CVE-2020-7796 can have devastating consequences for a business, including: Attackers can map the internal network infrastructure behind
Gaining entry to arbitrary internal or external hosts.
Quick Info * NVD Published Date: 02/18/2020. * NVD Last Modified: 02/18/2026. * Source: MITRE. National Institute of Standards and Technology (.gov) Zimbra Collaboration Suite SSRF (CVE-2020-7796) - Acunetix
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 I need to gather detailed information about this CVE
| Attribute | Details | |-----------|---------| | | CVE-2020-27996 | | Affected Product | Zimbra Collaboration Suite (ZCS) | | Affected Versions | 8.8.15 prior to Patch 11, 9.0.0 prior to Patch 5 | | Component | Proxy Servlet / UserServlet | | Attack Vector | Network / HTTP | | Authentication | None required (Pre-auth RCE) | | CVSS v3 Score | 9.8 (Critical) | | Disclosure Date | November 2020 | | Exploit Maturity | Public PoC available within days of patch |
Because of insufficient input validation, a remote, unauthenticated attacker can send a specially crafted HTTP request to the server. This tricks the server into making further requests to other internal or external systems on the attacker's behalf. Why is this Dangerous? Unauthorized Access
structure for testing your own environment against this SSRF? CVE-2020-7796 Detail - NVD
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