CVE-2023-51219Public exploitNetwork attack vector

Account takeover via deep-link WebView token theft

Published Jun 3, 2024 · Updated Feb 19, 2025

Cross-site scripting in KakaoTalk 10.4.3 allows remote attackers to steal an access token and take over an account through a malicious link. The exported CommerceBuyActivity appends attacker-controlled deep-link components to buy.kakao.com, follows a redirect into an XSS sink, and sends its token in the Authorization header. A user must click the crafted link; the stolen token permits password reset, device registration, and reading non-encrypted chat messages.

CVSS severity9.6
Critical
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in KakaoTalk 10.4.3 allows remote attackers to steal an access token and take over an account through a malicious link. The exported CommerceBuyActivity appends attacker-controlled deep-link components to buy.kakao.com, follows a redirect into an XSS sink, and sends its token in the Authorization header. A user must click the crafted link; the stolen token permits password reset, device registration, and reading non-encrypted chat messages.

The record

CVE
CVE-2023-51219
Published
Jun 3, 2024
Updated
Feb 19, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1528, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 19, 2025Record 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

9.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1528Steal Application Access Token
T1204.001Malicious Link

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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