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TI-2021-18592 Aliases CVE-2021-42083GHSA-9c8q-55w7-h67h

Authenticated Stored XSS in OSNEXUS QuantaStor 6.0.0.335

Priority LOW 38CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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 * click apply * create a test alert * The test alert will run the command “id | tee /tmp/ttttttddddssss” as root. * after the test alert inspect /tmp/ttttttddddssss it'll contain the ids of the root user.

Why it matters now

EPSS 0.00547 46th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA
Fix Fixed QuantaStor (OSNEXUS): 6.0.0.355

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
OSNEXUSQuantaStorbefore 6.0.0.3556.0.0.355Patch availableCNA
  • QuantaStor VendorOSNEXUS Affected before 6.0.0.355 Fixed in 6.0.0.355 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:*before 6.0.0.355VulnerableOSNEXUS
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*not specified by NVDRunning onLinux
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:* Versions before 6.0.0.355 Vulnerable ·OSNEXUS
  • cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

  • Fix · CNA QuantaStor (OSNEXUS) Fixed in 6.0.0.355

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    OSNEXUS QuantaStor 6.0.0.355

    5 records Highest priority Priority MEDIUM 1 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2021-18590 Authenticated Remote Command Execution vulnerability in OSNEXUS QuantaStor before 6.0.0.355Priority MEDIUM 44
    • TI-2021-18591 Local Privilege Escalation to root in OSNEXUS QuantaStor before 6.0.0.355Priority LOW 35
    • TI-2021-18589 Reflected XSS vulnerability in OSNEXUS QuantaStor before 6.0.0.355Priority LOW 34
    Show all 5 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-42083
  2. 2026-10-03 Alias added: GHSA-9c8q-55w7-h67h

References

Exploit 2

Advisory 1

Other 1

  • TI-2021-03263 Authenticated Remote COmmand Execution as root in OSNEXUS QuantaStor version 6.0.0.355 and others CVSS 3.1CRITICAL 9.1
  • TI-2021-18590 Authenticated Remote Command Execution vulnerability in OSNEXUS QuantaStor before 6.0.0.355 CVSS 3.1CRITICAL 9.1
  • TI-2021-18591 Local Privilege Escalation to root in OSNEXUS QuantaStor before 6.0.0.355 CVSS 3.1HIGH 7.8
  • TI-2021-18589 Reflected XSS vulnerability in OSNEXUS QuantaStor before 6.0.0.355 CVSS 3.1HIGH 7.4
  • TI-2017-07338 On the OSNEXUS QuantaStor v4 virtual appliance before 4.3.1, if the REST call invoked… CVSS 3.0MEDIUM 6.1
  • TI-2017-07337 On the OSNEXUS QuantaStor v4 virtual appliance before 4.3.1, a flaw was found with the… CVSS 3.0MEDIUM 5.3
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences