PHP Vulnerability Responses by Company

KAIKATSU FRONTIER Inc.

Companies / web services
Aliases / services
快活フロンティア / KAIKATSU FRONTIER / 快活CLUB / 快活クラブ / 株式会社ヴァリック / KAIKATSU FRONTIER Inc. / 株式会社快活フロンティア
Official website
https://kaikatsufrontier.co.jp/
Sources identifying the operating company

Each response applies only to its stated service scope. “Not listed” does not mean unpatched or unaffected.

Response status by service

Kaikatsu CLUB member app

Response status
Partially suspended as a precaution
Response information checked
2026-10-29

Current re-audit: Official response verified · Research date: 2026-10-29

Following PHP vulnerability disclosure, the notice suspends app functions except the membership card, coupons, new-member/switch-registration changes and app reservations. The official image was checked.

Scope: Findings apply only to the specified service and incident, not other services or historical breaches.

What users should do

The membership card is excluded from the suspension. Check official notices for restoration of other functions.

Official service URL

Source URLs

  1. PHP precautions, updated October 29https://www.kaikatsu.jp/info/detail/maintenance_20261021.htmlResponse evidence
  2. Official affected-function notice imagehttps://www.kaikatsu.jp/info/images/2026/20261021_KCmaintenance_w1000_4.pngResponse evidence
  3. 2025 intrusion investigation, fifth reporthttps://www.kaikatsu.jp/info/detail/ddos.htmlResponse evidence
Related official sources
  1. Company profileOfficial information directoryIdentifies the operating company.
  2. Former-name change noticeOfficial information directoryIdentifies the operating company.
  3. PHP precautions, updated October 29Official noticeFindings apply only to the specified service and incident, not other services or historical breaches.
  4. Official affected-function notice imageOfficial noticeFindings apply only to the specified service and incident, not other services or historical breaches.
  5. 2025 intrusion investigation, fifth reportOfficial noticeHistorical incident, separate from the current PHP precautions.

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