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CVE-2021-41609

29
FAUCET Score

CVE-2021-41609 is a critical SQL injection vulnerability affecting SelectSurvey.NET versions prior to 5.052.000. An unauthenticated attacker can exploit this flaw in the UploadedImageDisplay.aspx endpoint's ID parameter to extract sensitive data from the backend database using boolean-based blind and UNION injection techniques. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with no user interaction, potentially leading to full compromise of confidentiality, integrity, and availability. While no public exploits, Metasploit modules, or Nuclei templates are currently available, and there is minimal community discussion, the high FAUCET Risk Score of 83/100 indicates its significant potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.052.000CPE matchmatch criteria
cpe:2.3:a:classapps:selectsurvey.net:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.14%
Probability of exploitation in next 30 days
EPSS Percentile
80.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0214 is in the 69th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

classapps.com / product_ssv5.aspx
ProductVendor Advisory
optiv.com / insights/source-zero/blog/classapps-inc-selectsurveynet-v50-vulnerabilities-disclosure
ExploitMitigationThird Party Advisory