CVE-2019-13608 KEVRansomwarePublic exploit High · 7.5 EPSS 30.0%
Citrix StoreFront Server XML External Entity (XXE) Processing Vulnerability
Citrix · StoreFront Server
Summary
Citrix StoreFront Server (versions before 1903, 7.15 LTSR before CU4, and 7.6 LTSR before CU8) contains an improper restriction of XML external entity references, which is the XML External Entity (XXE) processing vulnerability. An attacker with network access can exploit it without authentication or user interaction, and the attack can lead to a high impact on confidentiality.
Official description · NVD
Citrix StoreFront Server before 1903, 7.15 LTSR before CU4 (3.12.4000), and 7.6 LTSR before CU8 (3.0.8000) allows XXE attacks.
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown. Breakdown
77.9 / 100
- Exploited
- Yes, in CISA KEV
- Reports
- 0
- Tactics
- 8/15
How an attack unfolds
Based on MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. mappings. Select a step to see the evidence.What they do
What can follow
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 17 months after disclosure.
- Disclosedday 0
- First seen exploitedVulnCheck KEV evidence+17 mo
- Added to CISA KEVknown ransomware use; EU database agrees+2 yrs
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
5 TechniqueOne specific attacker behaviour in MITRE ATT&CK, such as T1190 “Exploit Public-Facing Application”. IDs with a dot, like T1059.004, are sub-techniques., grouped by TacticThe attacker’s goal at a stage of an attack in MITRE ATT&CK, such as Initial Access or Persistence. Each technique belongs to one or more tactics. in kill-chain order 5Initial AccessTA0001
MITRE CTID mapping of the KEV entry · follow-on activity
CVE-2019-13608 is a an XML External Entity (XXE) processing vulnerability that may allow an unauthenticated attacker to retrieve potentially sensitive information.
ExecutionTA0002
MITRE CTID mapping of the KEV entry · primary impact
Credential AccessTA0006
OS Credential Dumping T1003
MITRE CTID mapping of the KEV entry · follow-on activity
DiscoveryTA0007
MITRE CTID mapping of the KEV entry · follow-on activity
CollectionTA0009
Data from Local System T1005
MITRE CTID mapping of the KEV entry · follow-on activity
Detection
0 rules for this CVE · 222 general rules for its techniquesRules for this CVE
0Sigma ruleAn open, vendor-neutral detection rule for log data. Security teams convert Sigma rules into searches for their own SIEM. that reference CVE-2019-13608 directly.CVE-specific rules are not available in this build. Search SigmaHQ ↗
General rules for this CVE’s techniques
These detect the technique in general, not this specific vulnerability.
Command and Scripting InterpreterT105995 general rules
- HackTool - Sliver C2 Implant Activity Patterncriticaltest
- Lazarus Group Activitycriticaltest
- REvil Kaseya Incident Malware Patternscriticaltest
- Turla Group Lateral Movementcriticaltest
- Windows Defender AMSI Trigger Detectedhighstable
- Windows Defender Threat Detectedhighstable
- Abusable DLL Potential Sideloading From Suspicious Locationhightest
- Add Insecure Download Source To Wingethightest
Valid AccountsT107856 general rules
- Win Susp Computer Name Containing Samtheadmincriticaltest
- Account Created And Deleted Within A Close Time Framehightest
- Activity From Anonymous IP Addresshightest
- Atypical Travelhightest
- Azure AD Threat Intelligencehightest
- Azure Subscription Permission Elevation Via AuditLogshightest
- External Remote SMB Logon from Public IPhightest
- Impossible Travelhightest
OS Credential DumpingT100337 general rules
- Antivirus - Password Dumper Signaturecriticalstable
- HackTool - Rubeus Executioncriticalstable
- Hacktool Execution - Imphashcriticaltest
- Potential Credential Dumping Via LSASS Process Clonecriticaltest
- WCE wceaux.dll Accesscriticaltest
- HackTool - Potential Remote Credential Dumping Activity Via CrackMapExec Or Impacket-Secretsdumphightest
- HackTool - Rubeus Execution - ScriptBlockhightest
- Hacktool Execution - PE Metadatahightest
Network Service DiscoveryT104620 general rules
- HackTool - winPEAS Executionhightest
- HackTool - WinPwn Executionhightest
- HackTool - WinPwn Execution - ScriptBlockhightest
- Grixba Malware Reconnaissance Activityhighexperimental
- OpenCanary - Host Port Scan (SYN Scan)highexperimental
- OpenCanary - NMAP FIN Scanhighexperimental
- OpenCanary - NMAP NULL Scanhighexperimental
- OpenCanary - NMAP OS Scanhighexperimental
Data from Local SystemT100514 general rules
- OpenCanary - SMB File Open Requesthightest
- Potential Conti Ransomware Database Dumping Activity Via SQLCmdhightest
- SQLite Chromium Profile Data DB Accesshightest
- SQLite Firefox Profile Data DB Accesshightest
- VeeamBackup Database Credentials Dump Via Sqlcmd.EXEhightest
- Script Interpreter Spawning Credential Scanner - Linuxhighexperimental
- Script Interpreter Spawning Credential Scanner - Windowshighexperimental
- Shai-Hulud NPM Package Malicious Exfiltration via Curlhighexperimental
Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.
What security researchers reported
Not named in any threat report yetAlso mentioned in 50 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Actively_Exploited_Kev | Oct 29, 202628 Oct 2026
- Actively_Exploited_Kev | Oct 28, 202627 Oct 2026
- Actively_Exploited_Kev | Oct 27, 202626 Oct 2026
- Actively_Exploited_Kev | Oct 24, 202623 Oct 2026
- Actively_Exploited_Kev | Oct 23, 202622 Oct 2026
- Actively_Exploited_Kev | Oct 22, 202621 Oct 2026
- 44 more on OTX