Auth bypass in Chess Play And Learn App
CVE-2026-13514
A weakness has been identified in Chess Play and Learn App up to 4.9.42 on Android. This issue affects some unknown processing of the file AndroidManifest.xml of the component com.chess. This manipulation causes exposure of backup file to an unauthorized control sphere. It is feasible to perform the attack on the physical device. The exploit has been made available to the public and could be used for attacks. Upgrading the affected component is advised. The vendor was informed early about this issue. They confirmed the existence and that they will address it. Furthermore, they explain that their bug bounty "explicitly excludes physical-access attacks". However, they appreciate the quality of the report and aim at making a goodwill payment to the researcher.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.4 (Low). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (7.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Chess Play And Learn App — versions 4.9.0, 4.9.1, 4.9.2
Weakness classification (CWE)
References
- vuldb.com/vuln/374522 (vdb-entry)
- vuldb.com/vuln/374522/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-13514 (third-party-advisory)
- vuldb.com/submit/838880 (third-party-advisory)
- github.com/honestcorrupt/CHESS.COM-CVE-REQUEST (exploit)
- play.google.com/store/apps/details (patch)
Frequently asked questions
- What is CVE-2026-13514?
- CVE-2026-13514 is a low-severity vulnerability in Chess Play And Learn App, classified under Improper Authorization. CVSS score: 2.4/10. Published 2026-06-29.
- How severe is CVE-2026-13514?
- Low severity. CVSS v3 base score is 2.4 out of 10.