CVE-2018-4377 json
A cross-site scripting issue existed in Safari.
published 2019-04-03 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16163
- cvss
- 6.1
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 68%
- public exploits
- 0
- none known
Summary
A cross-site scripting issue existed in Safari. This issue was addressed with improved URL validation. This issue affected versions prior to iOS 12.1, watchOS 5.1, Safari 12.0.1, iTunes 12.9.1, iCloud for Windows 7.8.
Patch / fix
- apple safari 12.0.1
- apple icloud 7.8
- apple itunes 12.9.1
- apple iphone_os 12.1
- apple watchos 5.1
Exploit prediction
1.19% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 6.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Affected products
- n/a iOS, watchOS, Safari, iTunes for Windows, iCloud for Windows
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
support.apple.com
/kb/HT209192
vendor-advisory
-
support.apple.com
/kb/HT209195
vendor-advisory
-
support.apple.com
/kb/HT209197
vendor-advisory
-
support.apple.com
/kb/HT209198
vendor-advisory
-
support.apple.com
/kb/HT209196
vendor-advisory
Sources
- CVE List CVE-2018-4377
- NVD CVE-2018-4377
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.