How severe is CVE-2025-25303?

CVE-2025-25303 has a CVSS 4.0 base score of 6.9, rated medium severity.

Is CVE-2025-25303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-25303?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-25303 have an EU (EUVD) identifier?

Yes. CVE-2025-25303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6010.

When was CVE-2025-25303 published?

CVE-2025-25303 was published on 2025-03-03 and last updated on 2026-06-17.

CVE-2025-25303

CVE-2025-25303 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Medium (CVSS 4.0 base score 6.9)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-6010
Weakness: CWE-918
Published: 2025-03-03
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-25303?: 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.
How severe is CVE-2025-25303?: CVE-2025-25303 has a CVSS 4.0 base score of 6.9, rated medium severity.
Is CVE-2025-25303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-25303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-25303 have an EU (EUVD) identifier?: Yes. CVE-2025-25303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6010.
When was CVE-2025-25303 published?: CVE-2025-25303 was published on 2025-03-03 and last updated on 2026-06-17.

References

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