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CVE-2019-9670

Synacor — Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference

Synacor · CWE-611 — XML external entity processing · in CISA KEV since 2022-01-10

ExigentKEV since 2022 · listed over a yearCISA KEVActively Exploited
87

EVRS 87 of 100 Immediate

Out-of-Band / Urgent Remediation

Rank 210 of 2,960 tracked

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Why it scores 87

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.999.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

zimbra collaboration suite: update to 8.7.11 or later

Affected versions

  • zimbra collaboration suite>= 8.7.0 < 8.7.118.7.11

Remediation

Apply updates per vendor instructions.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 9.8 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.999 (99.98th pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2022-07-10 · KEV since 2022 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. Public module exists Metasploit
EUVD cross-referenceENISA's record: CVSS 9.8 (v3.1), assigned by mitre. Listed ENISA EUVD

Description

NVD

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.

What CISA says to do

Public module

Metasploit lists a public excellent-rank module for this CVE: Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF (linux/http/zimbra_xxe_rce). A module existing is not the same as active exploitation; see metasploit.com.