PatchTheCVECVE-2021-42079: An authenticated administrator is able to prepare an alert that is able to execute an SSRF attack
CVE-2021-42079 is a medium-severity flaw (CVSS 6.2) affecting quantastor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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&smtpUsername=a&smtpPassword=1&smtpAuthType=1&customerSupportEmailAddress=1&poolFreeSpaceWarningThreshold=1&poolFreeSpaceAlertThreshold=1&poolFreeSpace
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.2 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | High |
| User interaction | Required |
| EPSS exploit chance | 0.7% (top 47%) |
| CISA exploited list | No |
| Weakness | CWE-918 |
| Published | 2023-07-10 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-42079?
quantastor: upgrade to 6.0.0.355. Exact commands for each OS are on this page.
Is CVE-2021-42079 being exploited?
CVE-2021-42079 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-42079 affect?
CVE-2021-42079 affects quantastor. Severity is medium (CVSS 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?senderEmailAdd
How urgent is CVE-2021-42079?
Priority 35/100. No elevated risk signals yet.
Related CVEs
- CVE-2021-4406 CRITICAL 9.1 UPGRADE An authenticated attacker is able to create alerts that trigger a stored XSS attack. POC * go to the ale
- CVE-2021-42083 HIGH 8.7 UPGRADE An authenticated attacker is able to create alerts that trigger a stored XSS attack. POC * go to the ale
- CVE-2021-42082 HIGH 7.8 UPGRADE Local users are able to execute scripts under root privileges. POC On the local host run the following comma
- CVE-2021-42081 CRITICAL 9.1 UPGRADE An authenticated administrator is allowed to remotely execute arbitrary shell commands via the API. POC http:
- CVE-2021-42080 HIGH 7.4 UPGRADE An attacker is able to launch a Reflected XSS attack using a crafted URL. POC: Visit the following URL https