CVE-2021-41976Network attack vector

Unauthenticated folder renaming via edit function

Published Oct 8, 2021 · Updated Sep 17, 2024

Improper authorization in Tad Uploader 3.5.3 and earlier allows remote attackers to rename book-list folders without logging in. The edit book list function accepts a folder-name change without verifying that the request comes from an authenticated, authorized user. Network access to the XOOPS module is sufficient, and the demonstrated consequence is limited to unauthorized modification of folder names.

CVSS severity5.3
Medium
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Tad Uploader 3.5.3 and earlier allows remote attackers to rename book-list folders without logging in. The edit book list function accepts a folder-name change without verifying that the request comes from an authenticated, authorized user. Network access to the XOOPS module is sufficient, and the demonstrated consequence is limited to unauthorized modification of folder names.

The record

CVE
CVE-2021-41976
Published
Oct 8, 2021
Updated
Sep 17, 2024
Vendor
Tad
Product
Tad Uploader
Classifications
CWE-306, CWE-285, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tad · Tad Uploaderversion=0 <=3.5.3

Published CVSS scores

5.3TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CWE-285Improper Authorization
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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