VulnerabilityModified

CVE-2018-5179

A service worker can send the activate event on itself periodically which allows it to run perpetually, allowing it to monitor activity by users.

HIGH 7.5EPSS 1.49%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A service worker can send the activate event on itself periodically which allows it to run perpetually, allowing it to monitor activity by users. Affects all versions prior to Firefox 60.

CVSS 3.0: 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 1.49% probability · 73th percentile
CISA KEV: Not listed
Weakness: CWE-772
Affected: mozilla/firefox
Source: security@mozilla.org

References

https://www.mozilla.org/en-US/security/advisories/mfsa2018-11/Vendor Advisory
https://www.mozilla.org/en-US/security/advisories/mfsa2018-11/Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.