CVE-2021-24443Public exploitNetwork attack vector

Stored XSS via unsanitized Biography field

Published Aug 2, 2021 · Updated Aug 3, 2024

Stored XSS in the Biography widget of KaineLabs Youzify before 1.0.7 allows remote authenticated users to execute script in profile viewers' browsers. The Biography field accepts and stores unsanitized markup, which is returned when the affected profile is rendered and executes as script. If an administrator views the profile, the script runs in that session and can perform administrative actions such as creating a rogue account.

CVSS severity5.4
Medium
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in the Biography widget of KaineLabs Youzify before 1.0.7 allows remote authenticated users to execute script in profile viewers' browsers. The Biography field accepts and stores unsanitized markup, which is returned when the affected profile is rendered and executes as script. If an administrator views the profile, the script runs in that session and can perform administrative actions such as creating a rogue account.

The record

CVE
CVE-2021-24443
Published
Aug 2, 2021
Updated
Aug 3, 2024
Vendor
KaineLabs
Product
Youzify
Classifications
CWE-79, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=1.0.7 <1.0.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

KaineLabs · Youzifyversion=1.0.7 <1.0.7

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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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