| Title | Buttercup Password Manager Buttercup Browser Extension <=v0.14.2 Improper Access Control – Sensitive Data Exposure (CWE-284 / CWE |
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| Description | The Buttercup Browser Extension through 0.14.2 allows any visited web page to craft hidden form elements and send synthetic mouse events that force the extension to search its vault and autofill credentials. An attacker who controls page JavaScript can capture the plaintext password, leading to high confidentiality impact. Fixed in v1.0.1.
PoC here: https://github.com/buttercup/buttercup-browser-extension/issues/92#issuecomment-372991430 |
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| Source | ⚠️ https://github.com/buttercup/buttercup-browser-extension/issues/92 |
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| User | lukechilds (UID 88472) |
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| Submission | 08/04/2025 13:48 (12 months ago) |
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| Moderation | 08/13/2025 18:23 (9 days later) |
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| Status | Accepted |
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| VulDB entry | 319969 [Buttercup buttercup-browser-extension up to 0.14.2 Vault access control] |
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| Points | 20 |
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