Is Reverso – Translation, dictionary safe?

Medium risk

Reverso sends the current page URL, page title, and a persistent device UUID to its servers with every translation query.

Each time a user translates selected text, the extension POSTs the source text, the URL of the page where the text was selected, and the page title to context.reverso.net alongside a device identifier generated at install time and stored indefinitely. This allows Reverso to build a per-device log of browsing context tied to translation activity. The extension also bundles hardcoded API credentials for a machine-translation backend in plaintext.

Reverso.netv2.2.205Firefox Add-ons
45Risk

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

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Findings

SeverityMEDIUM
ClassUNWANTED
TypeUnexpected
CWECWE-359
SourceAI SANDBOX

Translation requests send page URL, title, and device UUID to Reverso.

Translating selected text with Reverso sends the page URL, title, selected text context, and a persistent device UUID to context.reverso.net, linking the request to the page and to a device identifier the extension stores.

01EvidenceCAUSE EFFECT
What actually happens
You did this

The user requests a translation for selected text on a page.

The extension did this

The extension posts the selected text, current page URL, page title, language direction, and persistent device UUID to Reverso.

02EvidenceNETWORK CAPTURE
Captured request
POSTcontext.reverso.net/api2/TranslateSimple
03EvidenceFIELD TABLE
Fields in the translation request
FieldValueWhy it matters
Current page URL
https://example.com/article (illustrative)Shows which page the user was viewing when the translation was requested.
Page title
Example Article Title (illustrative)Adds human-readable page context to the translation request.
Persistent device UUID
d7f3a1b2-4c5d-6789-abcd-ef0123456789 (illustrative)Links translation requests from the same browser installation over time.

Data recipients

context.reverso.netapi.translation.ent.reverso.net
Updated 17 September 2026amo-727124