Account-data disclosure via unrestricted ADB backups
Published Jun 28, 2026 · Updated Jun 28, 2026
Information disclosure in Chess.com Chess - Play and Learn Online 4.9.42 and earlier allows physically proximate attackers to read account data. AndroidManifest.xml sets android:allowBackup to true without exclusion rules, so ADB backup exports plaintext Google OAuth tokens from shared preferences. Physical access, authorized USB debugging, and device confirmation are required; the exposed token reveals identity claims and remains usable until expiry.
Summary
What happened
Information disclosure in Chess.com Chess - Play and Learn Online 4.9.42 and earlier allows physically proximate attackers to read account data. AndroidManifest.xml sets android:allowBackup to true without exclusion rules, so ADB backup exports plaintext Google OAuth tokens from shared preferences. Physical access, authorized USB debugging, and device confirmation are required; the exposed token reveals identity claims and remains usable until expiry.
The record
- CVE
- CVE-2026-13514
- Published
- Jun 28, 2026
- Updated
- Jun 28, 2026
- Vendor
- Chess.com
- Product
- Chess - Play and Learn Online
- Classifications
- CWE-530, CWE-285, T1533
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 28, 2026CVE publishedPublication date reported by the CVE source.
- Jun 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4.9.0
- Affected versionversion=4.9.1
- Affected versionversion=4.9.10
- Affected versionversion=4.9.11
- Affected versionversion=4.9.12
- Affected versionversion=4.9.13
- Affected versionversion=4.9.14
- Affected versionversion=4.9.15
- Affected versionversion=4.9.16
- Affected versionversion=4.9.17
- Affected versionversion=4.9.18
- Affected versionversion=4.9.19
- Affected versionversion=4.9.2
- Affected versionversion=4.9.20
- Affected versionversion=4.9.21
- Affected versionversion=4.9.22
- Affected versionversion=4.9.23
- Affected versionversion=4.9.24
- Affected versionversion=4.9.25
- Affected versionversion=4.9.26
- Affected versionversion=4.9.27
- Affected versionversion=4.9.28
- Affected versionversion=4.9.29
- Affected versionversion=4.9.3
- Affected versionversion=4.9.30
- Affected versionversion=4.9.31
- Affected versionversion=4.9.32
- Affected versionversion=4.9.33
- Affected versionversion=4.9.34
- Affected versionversion=4.9.35
- Affected versionversion=4.9.36
- Affected versionversion=4.9.37
- Affected versionversion=4.9.38
- Affected versionversion=4.9.39
- Affected versionversion=4.9.4
- Affected versionversion=4.9.40
- Affected versionversion=4.9.41
- Affected versionversion=4.9.42
- Affected versionversion=4.9.5
- Affected versionversion=4.9.6
- Affected versionversion=4.9.7
- Affected versionversion=4.9.8
- Affected versionversion=4.9.9
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- ADB backup extraction proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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