mailboxd component in Synacor Zimbra Collaboration Suite 8.7.x before 8.7.11p10 has an XML External Entity injection (XXE) vulnerability, as demonstrated by Autodiscover/Autodiscover.xml.
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Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-01-10), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.
mailboxd component in Synacor Zimbra Collaboration Suite 8.7.x before 8.7.11p10 has an XML External Entity injection (XXE) vulnerability, as demonstrated by Autodiscover/Autodiscover.xml.
May 29, 2019
November 4, 2025
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.
Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
Zimbra RCE PoC - CVE-2019-9670 XXE/SSRF
Open source ↗Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit)
Open source ↗Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF
Open source ↗Synacor Zimbra Collaboration <8.7.11p10 - XML External Entity Injection
Open source ↗See which npm, PyPI, Go, and Maven packages are affected by CVE-2019-9670
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CWE-611