Synacor

Synacor's Zimbra Collaboration Suite (ZCS) has a critical vulnerability (CVE-2019-9621) that allows attackers to manipulate the server into making unauthorized requests to internal or external resources, potentially exposing sensitive data and compromising network security. The vulnerability, classified under CWE-918 and CWE-807, is being actively exploited and poses significant risks to organizations using the platform. CISA has issued an urgent warning, requiring federal agencies to implement necessary mitigations or discontinue use of affected systems by July 28, 2025.

Source: https://cybersecuritynews.com/cisa-warns-of-zcs-vulnerability/

TPRM report: https://scoringcyber.rankiteo.com/company/synacor

"id": "syn636070825",
"linkid": "synacor",
"type": "Vulnerability",
"date": "7/2025",
"severity": "50",
"impact": "2",
"explanation": "Attack limited on finance or reputation"

{'affected_entities': [{'industry': 'Technology',
                        'name': 'Synacor',
                        'type': 'Organization'}],
 'attack_vector': 'SSRF (Server-Side Request Forgery)',
 'data_breach': {'sensitivity_of_data': 'High',
                 'type_of_data_compromised': ['sensitive internal data',
                                              'cloud data']},
 'date_detected': '2025-07-07',
 'description': 'A server-side request forgery (SSRF) flaw in Zimbra '
                'Collaboration Suite allows attackers to make unauthorized '
                'requests to internal or external resources, exposing '
                'sensitive data and compromising network security.',
 'impact': {'data_compromised': ['sensitive internal data', 'cloud data'],
            'systems_affected': ['Zimbra Collaboration Suite',
                                 'internal services',
                                 'backend systems']},
 'initial_access_broker': {'entry_point': 'ProxyServlet component',
                           'high_value_targets': ['internal services',
                                                  'backend systems',
                                                  'metadata services']},
 'motivation': 'Establish initial footholds in enterprise environments, scan '
               'internal networks, access metadata services, and interact with '
               'backend systems',
 'post_incident_analysis': {'corrective_actions': ['Apply vendor-provided '
                                                   'mitigations',
                                                   'Follow BOD 22-01 guidance '
                                                   'for cloud services',
                                                   'Consult Zimbra’s official '
                                                   'security advisories',
                                                   'Consult National '
                                                   'Vulnerability Database'],
                            'root_causes': 'Server-Side Request Forgery (SSRF) '
                                           'flaw in ProxyServlet component'},
 'references': [{'date_accessed': '2025-07-07', 'source': 'CISA'}],
 'regulatory_compliance': {'regulatory_notifications': ['CISA Known Exploited '
                                                        'Vulnerabilities (KEV) '
                                                        'catalog']},
 'response': {'remediation_measures': ['Apply vendor-provided mitigations',
                                       'Follow BOD 22-01 guidance for cloud '
                                       'services',
                                       'Consult Zimbra’s official security '
                                       'advisories',
                                       'Consult National Vulnerability '
                                       'Database']},
 'title': 'Critical Vulnerability in Synacor’s Zimbra Collaboration Suite '
          '(ZCS)',
 'type': 'Vulnerability Exploitation',
 'vulnerability_exploited': 'CVE-2019-9621'}