CVE-2021-41608Public exploitNetwork attack vector

Unauthenticated file disclosure via sequential IDs

Published Jan 28, 2022 · Updated Aug 4, 2024

File disclosure in UploadedImageDisplay.aspx in ClassApps SelectSurvey.NET before 5.052.000 allows remote attackers to retrieve survey uploads. The endpoint accepts an ID value and returns the database-stored file assigned to that sequential identifier without checking access authorization. An unauthenticated network request is sufficient, and enumerating IDs from 1 exposes other users’ submitted attachments in bulk.

CVSS severity7.5
High
EPSS probability1.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

File disclosure in UploadedImageDisplay.aspx in ClassApps SelectSurvey.NET before 5.052.000 allows remote attackers to retrieve survey uploads. The endpoint accepts an ID value and returns the database-stored file assigned to that sequential identifier without checking access authorization. An unauthenticated network request is sufficient, and enumerating IDs from 1 exposes other users’ submitted attachments in bulk.

The record

CVE
CVE-2021-41608
Published
Jan 28, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-639, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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