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CVE-2021-42083

18
FAUCET Score

CVE-2021-42083 describes a stored Cross-Site Scripting (XSS) vulnerability affecting various Linux, Windows, and QuantaStor products. An authenticated attacker can inject malicious code into alert configurations, which then executes when a test alert is triggered. This vulnerability has a CVSS score of 5.4 (Medium), indicating a network-based attack with low complexity requiring user interaction, potentially leading to limited impact on confidentiality and integrity. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.0.0.355CPE matchmatch criteria
cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:*
>= 0, < 6.0.0.355CPE match
cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.7HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.55%
Probability of exploitation in next 30 days
EPSS Percentile
42.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0055 is in the 68th percentile among its peer group of 15,239 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

divd.nl / DIVD-2021-00020
csirt.divd.nl / CVE-2021-42083
Third Party Advisory
csirt.divd.nl / DIVD-2021-00020
osnexus.com / products/software-defined-storage
Product
wbsec.nl / osnexus
Third Party Advisory