EUVD-2026-77253
GHSA-wpq3-9fhm-ph6x
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-delivered via crafted link requiring one user click; no privileges needed; limited confidentiality and integrity impact, no availability impact.
Primary rating from Vendor (jpcert).
CVSS VectorVendor: jpcert
Lifecycle Timeline
3DescriptionCVE.org
The Android application "YAMAP -Social Trekking GPS App" contains an improper access control vulnerability in its WebView implementation. The in-app browser may cause information leakage from the app or redirect users to unintended websites.
AnalysisAI
The YAMAP - Social Trekking GPS App for Android exposes users to information leakage and unauthorized redirects through an improperly controlled WebView (in-app browser) implementation. The vulnerability stems from insufficient access control over which URLs or communication sources the WebView will process, allowing a crafted link or external input to steer the browser toward attacker-controlled content or harvest app-internal data. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim be a user of the YAMAP Android application and that they actively interact with (click) a malicious link that is opened within the app's WebView-based in-app browser. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N) yields a score of 5.1 (Medium), which aligns with the realistic impact: low confidentiality and integrity effects, no availability impact, and user interaction (UI:A - active user interaction, i.e., clicking a link) required. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Users should update the YAMAP Android application to the version specified as fixed in the vendor advisory at https://info.yamap.com/archives/8173, which addresses the WebView access control deficiency. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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