Unauthenticated redirects via unchecked stored option writes
Published Oct 19, 2026 · Updated Oct 19, 2026
Missing authorization in App Cheap App Builder before 5.7.1 allows remote attackers to modify an option and redirect visitors. The app-builder-callback handler stores attacker-supplied data without authentication or authorization, and app-builder-return builds a redirect URI from that stored data. Redirecting a visitor requires a separate request to the return handler; the established impact is option modification and browser redirection, not server-side code execution.
Summary
What happened
Missing authorization in App Cheap App Builder before 5.7.1 allows remote attackers to modify an option and redirect visitors. The app-builder-callback handler stores attacker-supplied data without authentication or authorization, and app-builder-return builds a redirect URI from that stored data. Redirecting a visitor requires a separate request to the return handler; the established impact is option modification and browser redirection, not server-side code execution.
The record
- CVE
- CVE-2026-94294
- Published
- Oct 19, 2026
- Updated
- Oct 19, 2026
- Vendor
- App Cheap
- Product
- App Builder
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 19, 2026CVE publishedPublication date reported by the CVE source.
- Oct 19, 2026Record 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.
- Affected versionversion=3.8.4 <5.7.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
No sourced classifications are available.
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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