CVE-2024-45203

Phishing via unrestricted custom URL requests

Published Sep 9, 2024 · Updated Mar 13, 2025

Improper authorization in @cosme App for Android before 5.69.0 and iOS before 6.74.0 allows attackers to open arbitrary websites. The custom URL scheme handler accepts a URL request from any application and opens the requested destination without restricting the caller. Exploitation requires user interaction with attacker-controlled content or an application that invokes the scheme, placing the user at risk of phishing.

CVSS severity3.3
Low
EPSS probability0.29%
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 @cosme App for Android before 5.69.0 and iOS before 6.74.0 allows attackers to open arbitrary websites. The custom URL scheme handler accepts a URL request from any application and opens the requested destination without restricting the caller. Exploitation requires user interaction with attacker-controlled content or an application that invokes the scheme, placing the user at risk of phishing.

The record

CVE
CVE-2024-45203
Published
Sep 9, 2024
Updated
Mar 13, 2025
Vendor
istyle Inc.
Product
@cosme App for iOS
Classifications
CWE-939, T1204.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 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?

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

  1. Affected versionversion=versions prior to 6.74.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

istyle Inc. · @cosme App for iOSversion=versions prior to 6.74.0
istyle Inc. · @cosme App for Androidversion=versions prior to 5.69.0

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
3.3JPCERT/CCCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-939Improper Authorization in Handler for Custom URL Scheme
T1204.001User Execution: Malicious Link

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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