CVE-2020-7796

Name: CVE-2020-7796
Creator: NVD / NIST
Published: 2020-02-18T22:15:10.013+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 85.42%

Last modified Jun 17, 2026

CVE-2020-7796 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.. CISA has confirmed active exploitation in the wild. EPSS estimates a 85.42% chance of exploitation in the next 30 days.

Description

Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

85.42%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Mar 10, 2026.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Synacor	Zimbra Collaboration Suite	< 8.8.15
Synacor	Zimbra Collaboration Suite	8.8.15

References

https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7Release Notes, Vendor Advisory
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7Release Notes, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7796US Government Resource

Timeline

Published: Feb 18, 2020
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2020-7796?

Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.

How severe is CVE-2020-7796?

CVE-2020-7796 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 85.42% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2020-7796?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-7796?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST