CVE-2023-29501

Login data interception via improper certificate verification

Published Jun 13, 2023 · Updated Jan 3, 2025

Improper certificate validation in Jiyu Kukan Toku-Toku Coupon 3.5.0 and earlier allows man-in-the-middle attackers to read login data. The iOS and Android clients fail to properly verify a server certificate while sending login or new-registration data over an encrypted connection. Exploitation requires login or registration through attacker-controlled Wi-Fi, exposing entered information without reported service interruption.

CVSS severity4.8
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Jiyu Kukan Toku-Toku Coupon 3.5.0 and earlier allows man-in-the-middle attackers to read login data. The iOS and Android clients fail to properly verify a server certificate while sending login or new-registration data over an encrypted connection. Exploitation requires login or registration through attacker-controlled Wi-Fi, exposing entered information without reported service interruption.

The record

CVE
CVE-2023-29501
Published
Jun 13, 2023
Updated
Jan 3, 2025
Vendor
RunSystem Co., Ltd.
Product
Jiyu Kukan Toku-Toku Coupon
Classifications
CWE-295, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 3, 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=Jiyu Kukan Toku-Toku coupon App for iOS versions 3.5.0 and earlier, and Jiyu Kukan Toku-Toku coupon App for Android versions 3.5.0 and earlier

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

RunSystem Co., Ltd. · Jiyu Kukan Toku-Toku Couponversion=Jiyu Kukan Toku-Toku coupon App for iOS versions 3.5.0 and earlier, and Jiyu Kukan Toku-Toku coupon App for Android versions 3.5.0 and earlier

Published CVSS scores

6.5JPCERT/CCCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
4.0JPCERT/CCAV:N/AC:H/Au:N/C:P/I:P/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

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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