CVE-2025-25303: Server-Side Request Forgery (SSRF) in MouseTooltipTranslator
Description
The MouseTooltipTranslator Chrome extension allows mouseover translation of any language at once. The MouseTooltipTranslator browser extension is vulnerable to SSRF attacks. The pdf.mjs script uses the URL parameter from the current URL as the file to download and display to the extension user. Because pdf.mjs is imported in viewer.html and viewer.html is accessible to all URLs, an attacker can force the user’s browser to make a request to any arbitrary URL. After discussion with maintainer, patching this issue would require disabling a major feature of the extension in exchange for a low severity vulnerability. Decision to not patch issue.
Classification
CVE ID: CVE-2025-25303
CVSS Base Severity: MEDIUM
CVSS Base Score: 6.9
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Problem Types
CWE-918: Server-Side Request Forgery (SSRF)Affected Products
Vendor: ttop32
Product: MouseTooltipTranslator
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.06% (probability of being exploited)
EPSS Percentile: 14.09% (scored less or equal to compared to others)
EPSS Date: 2025-04-01 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-25303https://securitylab.github.com/advisories/GHSL-2024-018_MouseTooltipTranslator/
https://github.com/ttop32/MouseTooltipTranslator/blob/0.1.127/public/manifest.json#L23
https://github.com/ttop32/MouseTooltipTranslator/blob/0.1.127/public/pdfjs/build/pdf.mjs#L13932