CVE-2017-5120
Inappropriate use of www mismatch redirects in browser navigation in Google Chrome prior to 61.0.3163.79 for Mac, Windows, and Linux, and…
- 6.5MediumCVSS base score
- 1.1%Exploitation in 30 daysEPSS · top 34% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Inappropriate use of www mismatch redirects in browser navigation in Google Chrome prior to 61.0.3163.79 for Mac, Windows, and Linux, and 61.0.3163.81 for Android, allowed a remote attacker to potentially downgrade HTTPS requests to HTTP via a crafted HTML page. In other words, Chrome could transmit cleartext even though the user had entered an https URL, because of a misdesigned workaround for cases where the domain name in a URL almost matches the domain name in an X.509 server certificate (but differs in the initial "www." substring).
Timeline
ID reserved
By Chrome
- 10 months later
· 10 months later
Published
- 7 years later
· 7 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 1.1% · top 34% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Affected products
Google Chrome prior to 61.0.3163.79 for Mac, Windows and Linux, and 61.0.3163.81 for Android
- affected Google Chrome prior to 61.0.3163.79 for Mac, Windows and Linux, and 61.0.3163.81 for Android
References
7
- https://crbug.com/718676 (opens in a new tab)x_refsource_MISCx_transferred
- GLSA-201709-15 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- RHSA-2017:2676 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 1039291 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 100610 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- DSA-3985 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://chromereleases.googleblog.com/2017/09/stable-channel-update-for-desktop.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2017-14229 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2017-5120)Record last updated .