HOMEVULNERABILITIESCVE-2021-41609
CRITICAL

CVE-2021-41609

CWE-89Published: January 28, 2022· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

SQL injection in the ID parameter of the UploadedImageDisplay.aspx endpoint of SelectSurvey.NET before 5.052.000 allows a remote, unauthenticated attacker to retrieve data from the application's backend database via boolean-based blind and UNION injection.

NVD Source

Technical Analysis

CVE-2021-41609 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-89): SQL injection vulnerabilities allow attackers to manipulate database queries, potentially exposing or modifying sensitive data.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

classapps1 product(s)
selectsurvey.net
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.classapps.com/product_ssv5.aspx
ADVISORYhttps://www.optiv.com/insights/source-zero/blog/classapps-inc-selectsurveynet-v50-vulnerabilities-disclosure
ADVISORYhttps://www.classapps.com/product_ssv5.aspx
ADVISORYhttps://www.optiv.com/insights/source-zero/blog/classapps-inc-selectsurveynet-v50-vulnerabilities-disclosure

All References (4)

→
https://www.classapps.com/product_ssv5.aspxProduct · Vendor Advisory
→
https://www.optiv.com/insights/source-zero/blog/classapps-inc-selectsurveynet-v50-vulnerabilities-disclosureExploit · Mitigation · Third Party Advisory
→
https://www.classapps.com/product_ssv5.aspxProduct · Vendor Advisory
→
https://www.optiv.com/insights/source-zero/blog/classapps-inc-selectsurveynet-v50-vulnerabilities-disclosureExploit · Mitigation · Third Party Advisory

Quick Facts

CVE IDCVE-2021-41609
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-89
CISA KEVNo
Affected1 vendor(s)
PublishedJan 28, 2022

Related CVEs (CWE-89)

CVE-2024-3820
10.0
CVE-2024-32888
10.0
CVE-2026-3325
10.0
CVE-2007-5452
10.0
CVE-2024-0851
10.0
CVE-2016-8027
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-41609 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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