CVE-2019-9670
Synacor Zimbra Collaboration Suite (ZCS): Improper Restriction of XML External Entity Reference
As of , CVE-2019-9670 in Synacor Zimbra Collaboration Suite (ZCS) is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 10 January 2022
- US federal deadline
- 10 July 2022181 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Not known to CISA
- EPSS score
- 0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- Not availableCISA listed it before 4 February 2022, where the EPSS files we read begin.
- Public exploit
- 1 Metasploit module and 1 Exploit-DB entry (1 verified)
- Fix
- No vendor link in CISA's entry
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
Synacor Zimbra Collaboration Suite (ZCS) contains an improper restriction of XML external entity (XXE) vulnerability in the mailboxd component.
CISA's description
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.
The CVE record's description, from mitre
- CVE published
- 29 May 2019
- Assigned by
- mitre
- CVSS
- 9.8 Critical (CVSS 3.1, from CISA-ADP)
- CWE-611
- Improper Restriction of XML External Entity Reference
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- yes
- CISA SSVC, technical impact
- total
Timeline
- Exploit-DB published an exploit (EDB-ID 46693).
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
- CISA changed its entry. Renamed from Zimbra Collaboration (ZCS) to Zimbra Collaboration Suite (ZCS). Edited: description and name.
Public exploits
Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.
- Metasploit: Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRFexploit module, rank excellent
- Exploit-DB: Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit)EDB-ID 46693, verified by Exploit-DB, 12 April 2019
Zimbra Collaboration Suite (ZCS): other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2026-73570OS Command Injection | Synacor Zimbra Collaboration Suite (ZCS) | Patch nowForensic triage required by CISA | 0.72 | ||
| CVE-2019-9621Server-Side Request Forgery (SSRF) | Synacor Zimbra Collaboration Suite (ZCS) | Patch this weekMetasploit module; EPSS 0.81; verified Exploit-DB entry | 0.81 | ||
| CVE-2022-41352Arbitrary File Upload | Synacor Zimbra Collaboration Suite (ZCS) | Patch this weekRansomware use; Metasploit module; EPSS 0.95 | 0.95 | ||
| CVE-2022-27925Arbitrary File Upload | Synacor Zimbra Collaboration Suite (ZCS) | Patch this weekRansomware use; Metasploit module; EPSS 0.99 | 0.99 | ||
| CVE-2022-37042Authentication Bypass | Synacor Zimbra Collaboration Suite (ZCS) | Patch this weekRansomware use; Metasploit module; EPSS 0.92 | 0.92 | ||
| CVE-2023-34192Cross-Site Scripting (XSS) | Synacor Zimbra Collaboration Suite (ZCS) | Patch this weekEPSS 0.77 | 0.77 | ||
| CVE-2024-45519Command Execution | Synacor Zimbra Collaboration Suite (ZCS) | Patch this weekEPSS 0.99 | 0.99 | ||
| CVE-2022-27924Command Injection | Synacor Zimbra Collaboration Suite (ZCS) | Patch this weekRansomware use; EPSS 0.94 | 0.94 | ||
| CVE-2018-6882Cross-Site Scripting (XSS) | Synacor Zimbra Collaboration Suite (ZCS) | Patch this weekRansomware use | 0.30 | ||
| CVE-2025-68645PHP Remote File Inclusion | Synacor Zimbra Collaboration Suite (ZCS) | Patch soon | 0.49 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org