Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Zimbra Collaboration Suite, an email and collaboration platform, is affected when its WebEx zimlet is installed and zimlet JSP support is enabled. An attacker could abuse this to make the server send requests to internal or otherwise unintended destinations, potentially exposing internal resources or sensitive information.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- Record last updated
- CISA remediation deadline
Due date for US federal agencies to patch
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- n/a n/a
Version range not reported
References 1
wiki.zimbra.com
Questions about CVE-2020-7796
What does this mean?
This bug is server-side request forgery (SSRF), which means the Zimbra server can be made to send network requests that it should not send. The advisory describes the risk as a potential one tied to a specific setup.Source: wiki.zimbra.com
Am I affected, and how do I check?
The advisory covers Zimbra Collaboration Suite (ZCS) versions before 8.8.15 Patch 7, and only when the WebEx zimlet is installed and zimlet JSP is enabled. To check the setup, look at whether the WebEx zimlet is installed and whether zimlet JSP is enabled on the server.Source: wiki.zimbra.com
What should I do about it?
Upgrade to ZCS 8.8.15 Patch 7 or later, which is the version the advisory names as the fix boundary. Until the upgrade is applied, the setup conditions in the advisory are the points to check.Source: wiki.zimbra.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-02-17, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data
What if there's no patch?
The checked facts do not include a workaround. The advisory ties the issue to two conditions, so removing the WebEx zimlet or disabling zimlet JSP would remove the setup it describes, but the facts do not confirm that this fully closes the issue.Source: wiki.zimbra.com