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Product
Threat intelligence API
Get started
Live feed
Recipes
Free feeds
CLI & agents
The data
Incident records
Dark web
Validated IOCs
Vulnerabilities
Entity graph
For teams
For service providers
Use cases
About ThreatCluster
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OpenAPI (Swagger)
ReDoc
Examples on GitHub
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Zimbra XSS Vulnerability
Vulnerability
Threat entity extracted from intelligence sources
Entities
›
vulnerability
›
Zimbra XSS Vulnerability
Frequency
1
occurrences
First Seen
March 19, 2026
Last Seen
March 19, 2026
API
Overview
Recent Events
Profile
Profile
MITRE ATT&CK
1 / 2
Exploited By
APT28
APT29
Cozy Bear
Fancy Bear
Midnight Blizzard
Strontium
Related CVEs
CVE-2025-66376
MITRE Techniques
T1041 - Exfiltration Over C2 Channel
T1203 - Exploitation for Client Execution
T1555.003 - Credentials From Web Browsers
T1566 - Phishing
T1567 - Exfiltration Over Web Service
Campaigns
Operation GhostMail
Affected Platforms
Zimbra
Regions
Russia
Ukraine
Sectors Affected
Government
-
REC
Recon
No techniques detected
-
RD
Resource Dev
No techniques detected
1
IA
Initial Access
T1566 - Phishing
1
EX
Execution
T1203 - Exploitation for Client Execution
-
PE
Persistence
No techniques detected
-
PE
Priv Esc
No techniques detected
-
DE
Defense Evasion
No techniques detected
1
CA
Cred Access
T1555.003 - Credentials From Web Browsers
-
DI
Discovery
No techniques detected
-
LM
Lateral Mov
No techniques detected
-
CO
Collection
No techniques detected
-
C2
C2
No techniques detected
2
EX
Exfil
T1041 - Exfiltration Over C2 Channel
T1567 - Exfiltration Over Web Service
-
IM
Impact
No techniques detected
5
techniques detected across
4
tactics
Related Articles (1)
Russian hackers exploit Zimbra flaw in Ukrainian govt attacks
Bleepingcomputer
·
Mar 19
Related Entities
APT28
APT29
Cozy Bear
Fancy Bear
Midnight Blizzard
Strontium
Phishing
Operation GhostMail
Ukrainian State Hydrology Agency
Russia
Ukraine
CVE-2025-66376
