CVE-2017-5928
The W3C High Resolution Time API, as implemented in various web browsers, does not consider that memory-reference times can be measured by a performance.now "Time to Tick" approach even with the https://bugzilla.mozilla.org/show_bug.cgi?id=1167489#c9…
Does this matter?
Lower severity and a low EPSS score (1.75%). Track it; it rarely justifies an emergency change on its own.
Description
The W3C High Resolution Time API, as implemented in various web browsers, does not consider that memory-reference times can be measured by a performance.now "Time to Tick" approach even with the https://bugzilla.mozilla.org/show_bug.cgi?id=1167489#c9 protection mechanism in place, which makes it easier for remote attackers to conduct AnC attacks via crafted JavaScript code.
- CVSS 3.1
- 3.7 LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 1.75% probability · 78th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- w3/high resolution time api
- Source
- cve@mitre.org
EPSS 1.7% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.cs.vu.nl/~herbertb/download/papers/anc_ndss17.pdfTechnical Description
- http://www.securityfocus.com/bid/97036Third Party Advisory, VDB Entry
- https://www.vusec.net/projects/ancThird Party Advisory
- http://www.cs.vu.nl/~herbertb/download/papers/anc_ndss17.pdfTechnical Description
- http://www.securityfocus.com/bid/97036Third Party Advisory, VDB Entry
- https://www.vusec.net/projects/ancThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.