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.
CVE-2019-9670
“—” beside the score: it is equal to NVD's CVSS score.
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.
Also known asEUVD-2019-19036 (ENISA EUVD) · GHSA-pj74-pf28-5qjw (GitHub Security Advisories)Source: ENISA EUVD
- Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at low mission impact
A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).
- CVSS v3
- 9.8
- EG Score
- 9.8CRITICALhigh confidence
- EG Risk
- 99EG Risk 99/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity98% × 45%Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation100% × 40%Fixed at 100% for a CISA KEV listing: EchelonGraph's rule.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Attend at low mission impact; Act at medium or high.Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation sooner than your normal schedule at low mission impact and as soon as possible at medium or high. - EPSS PROB
- >99.9%
- EPSS %ILE
- 99th
- KEV
- ⚠ Exploited
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- >99.9% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- CISA KEV and EG-KEV Tier 1 (exploited in the wild)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Act at medium mission impactAttend at low mission impact; Act at medium or high.CISA BOD 26-04: 3 days & forensic triage if the affected system is publicly exposed; 3 days & forensic triage if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: this CVE is in CISA's KEV catalog, and CISA's required action for it, quoted below, applies whether or not a fix is released.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Attend at low mission impact; Act at medium or high.
A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation sooner than your normal schedule at low mission impact and as soon as possible at medium or high.
Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days & forensic triage if the affected system is publicly exposed; 3 days & forensic triage if it is not.
No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: this CVE is in CISA's KEV catalog, and CISA's required action for it, quoted below, applies whether or not a fix is released.
The score's inputs: In CISA KEV yes (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
CISA required action“Apply updates per vendor instructions.”
Quoted verbatim from CISA's Known Exploited Vulnerabilities catalog. CISA directs it at US federal civilian executive branch agencies under Binding Operational Directive (BOD) 26-04, which replaced BOD 22-01 on 10 June 2026; it is not EchelonGraph's advice. CISA's notes: https://nvd.nist.gov/vuln/detail/CVE-2019-9670
Published
May 29, 2019
Last Modified
November 4, 2025
Advisory Details (6)
Auto-updated Oct 30, 2026CVE-2019-9670: Zimbra Collaboration Suite XXE vulnerability
https://isc.sans.edu/forums/diary/CVE20199670+Zimbra+Collaboration+Suite+XXE+vulnerability/27570/Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF | Metasploit Module
http://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rcePacket Storm
http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.htmlZimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit) - Linux remote Exploit
https://www.exploit-db.com/exploits/46693/Zimbra Security Advisories - Zimbra :: Tech Center
https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesWeakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 13× in last 7d / 99× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 940 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 840 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 23:06 UTCEG score recompute
- 2026-11-01 23:06 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-31 22:16 UTCEG score recompute
- 2026-10-31 22:16 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-30 21:23 UTCEG score recompute
- 2026-10-30 21:23 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-29 20:33 UTCEG score recompute
- 2026-10-29 20:33 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-28 19:42 UTCEG score recompute
- 2026-10-28 19:42 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-27 18:52 UTCEG score recompute
- 2026-10-27 18:52 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-27 16:27 UTCEPSS rescoreEPSS >99.9% · 99th percentile
- 2026-10-26 18:01 UTCEG score recompute
- 2026-10-26 18:01 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-25 17:09 UTCEG score recompute
- 2026-10-25 17:08 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-24 16:17 UTCEG score recompute
- 2026-10-24 16:17 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-23 15:27 UTCEG score recompute
- 2026-10-23 15:27 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-22 14:36 UTCEG score recompute
- 2026-10-22 14:36 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-21 13:45 UTCEG score recompute
- 2026-10-21 13:45 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
Show 75 moreShow fewer
- 2026-10-20 12:55 UTCEG score recompute
- 2026-10-20 12:55 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-19 12:04 UTCEG score recompute
- 2026-10-19 12:04 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-18 11:13 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-18 09:40 UTCEG score recompute
- 2026-10-17 10:22 UTCEG score recompute
- 2026-10-17 10:22 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-16 09:31 UTCEG score recompute
- 2026-10-16 09:31 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-15 08:40 UTCEG score recompute
- 2026-10-15 08:40 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-14 16:28 UTCEPSS rescoreEPSS >99.9% · 99th percentile
- 2026-10-14 07:49 UTCEG score recompute
- 2026-10-14 07:49 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-13 06:58 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-12 19:50 UTCEG score recompute
- 2026-10-12 06:07 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-12 02:13 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-11 22:19 UTCEG score recompute
- 2026-10-11 22:19 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-11 18:28 UTCEG score recompute
- 2026-10-11 18:28 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-11 14:36 UTCEG score recompute
- 2026-10-11 14:36 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-11 10:45 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-11 06:54 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-11 03:03 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-10 23:10 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-10 19:19 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-10 15:27 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-10 11:33 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-10 07:42 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-10 03:51 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-10 00:00 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-09 20:09 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-09 16:18 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-09 12:26 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-09 08:33 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-09 04:40 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-09 00:48 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-08 20:57 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-08 17:06 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-08 13:15 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-08 09:24 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-08 05:33 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-08 01:42 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-07 21:50 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-07 18:00 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-07 14:09 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-07 10:16 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-07 06:23 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-07 02:32 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 22:41 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 18:50 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 14:59 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 11:08 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 07:17 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 03:26 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 03:25 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-05 23:33 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-05 19:40 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-05 15:49 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-05 11:55 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-05 08:05 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-05 04:14 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-05 00:23 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-04 20:31 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-04 16:40 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-04 12:49 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-04 08:58 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-04 05:07 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-04 01:16 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-03 21:25 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-03 17:34 UTCGHSA enrichmentGHSA-pj74-pf28-5qjw · GitHub severity CRITICAL · GitHub CVSS 9.8
Publicly available exploits
(4 references)Public exploit code is referenced for this CVE (1 Metasploit module, 1 Exploit-DB entry, 1 GitHub PoC), as is 1 Nuclei detection template. A detection template checks whether a system is affected; it is not necessarily exploit code. No release with the fix is confirmed, so defenders should restrict or isolate affected systems accordingly until one is applied.
- Exploit-DBEDB-46693✓ verifiedPublished Apr 12, 2019
Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit)
Open source ↗ - Metasploitexploit/linux/http/zimbra_xxe_rce✓ verifiedPublished Apr 10, 2019
Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF
Open source ↗ - Nucleihttp/cves/2019/CVE-2019-9670.yamlPublished Oct 29, 2020
Synacor Zimbra Collaboration <8.7.11p10 - XML External Entity Injection
Open source ↗ - GitHub PoCrek7/Zimbra-RCEPublished Aug 16, 2019
Zimbra RCE PoC - CVE-2019-9670 XXE/SSRF
Open source ↗
Related CVEs(same CWE)
Same CWE
10 shownCWE-611
Frequently asked(6)
What is CVE-2019-9670?
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Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2019-9670
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