Actively exploited · Published Feb 18, 2020 · Assigned by mitre
CVE-2020-7796
Critical 9.8 Exploited
In plain English
A critical-severity server-side request forgery in Zimbra Collaboration Suite from Synacor. Attackers are actively exploiting it in the wild (listed by CISA on February 17, 2026). The chance it is exploited in the next 30 days is estimated at 93.6% (higher than 99.8% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Mar 10, 2026.
Official description
Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7 x_refsource_CONFIRM
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7796 government-resource