CVE-2021-41565Network attack vector

Reflected XSS via insufficient special-page filtering

Published Oct 8, 2021 · Updated Sep 16, 2024

Reflected XSS in Tad TadTools 3.2.1 and earlier allows remote attackers to inject JavaScript through a special-page parameter. The parameter accepts restricted characters without adequate filtering and reflects attacker-supplied JavaScript into the generated page; the public record does not name the parameter or code locus. No authentication is required, but a user must open the crafted request for the script to run in the TadTools site's browser context.

CVSS severity6.1
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Tad TadTools 3.2.1 and earlier allows remote attackers to inject JavaScript through a special-page parameter. The parameter accepts restricted characters without adequate filtering and reflects attacker-supplied JavaScript into the generated page; the public record does not name the parameter or code locus. No authentication is required, but a user must open the crafted request for the script to run in the TadTools site's browser context.

The record

CVE
CVE-2021-41565
Published
Oct 8, 2021
Updated
Sep 16, 2024
Vendor
Tad
Product
TadTools
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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 <=3.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tad · TadToolsversion=0 <=3.2.1

Published CVSS scores

6.1TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NVDAV:N/AC:M/Au:N/C:N/I:P/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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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