CVE-2019-13608 Citrix StoreFront Server: web page flaw
In plain words: A web app can be made to act on someone's behalf or reach places it should not. Stolen sessions, actions taken as the victim, or access to internal systems.
Confirmed exploited by CISA on · US federal patch deadline May 3, 2022
What to do
- Install Citrix's security update for StoreFront Server. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Patch edge devices first — attackers often start scanning for them within hours of a fix.
- Never expose the device's admin page to the internet.
- After patching a device that was exposed, follow the vendor's compromise checks, end active sessions and change passwords.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: They face the internet and guard the whole network, so a flaw here can hand attackers a way in — and these devices usually run no antivirus, so break-ins go unnoticed.
The details
- Official name
- Citrix StoreFront Server XML External Entity (XXE) Processing Vulnerability
- Product
- Citrix StoreFront Server
- CISA description
- Citrix StoreFront Server contains an XML External Entity (XXE) processing vulnerability that may allow an unauthenticated attacker to retrieve potentially sensitive information.
- Type of flaw
- Web page flaw (CWE-611)
- Confirmed exploited
- Nov 3, 2021 — known to be used in ransomware attacks
- US federal patch deadline
- May 3, 2022
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Answering about CVE-2019-13608 ·
Questions about CVE-2019-13608
Is CVE-2019-13608 being exploited?
Yes. CISA added CVE-2019-13608 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means there is reliable evidence of real-world attacks, including by ransomware groups.
How do I fix CVE-2019-13608?
Install Citrix's security update for StoreFront Server. If no update exists, follow the vendor's workaround or stop using the product until one ships. Patch edge devices first — attackers often start scanning for them within hours of a fix.
Am I affected by CVE-2019-13608?
Only if you use Citrix StoreFront Server. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.