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TI-2021-11257 Aliases CVE-2021-30888

Open redirect in Apple iOS and iPadOS

Priority LOW 36CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 3 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-601.

Summary

An information leakage issue was addressed. This issue is fixed in iOS 15.1 and iPadOS 15.1, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1. A malicious website using Content Security Policy reports may be able to leak information via redirect behavior .

Why it matters now

EPSS 0.01729 77th percentileScored 2026-11-07
Fix Partial iOS and iPadOS (Apple): 15.1, 14.8macOS (Apple): 12.0, 8.1, 15.1Red Hat: 2 advisoriesRed Hat: 3 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleiOS and iPadOSbefore 15.115.1Patch availableCNA
AppleiOS and iPadOSbefore 14.814.8Patch availableCNA
ApplemacOSbefore 12.012.0Patch availableCNA
ApplemacOSbefore 8.18.1Patch availableCNA
ApplemacOSbefore 15.115.1Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 15.1 Fixed in 15.1 Patch available CNA
  • iOS and iPadOS VendorApple Affected before 14.8 Fixed in 14.8 Patch available CNA
  • macOS VendorApple Affected before 12.0 Fixed in 12.0 Patch available CNA
  • macOS VendorApple Affected before 8.1 Fixed in 8.1 Patch available CNA
  • macOS VendorApple Affected before 15.1 Fixed in 15.1 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:*before 14.8.1VulnerableApple
cpe:2.3:o:apple:ipados:15.0:*:*:*:*:*:*:*15.0VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 14.8.1VulnerableApple
cpe:2.3:o:apple:iphone_os:15.0:*:*:*:*:*:*:*15.0VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*before 12.0.1VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 15.1VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 8.1VulnerableApple
  • cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:* Versions before 14.8.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.8.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 12.0.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 15.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 8.1 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 15.1
  • Fix · CNA iOS and iPadOS (Apple) Fixed in 14.8
  • Fix · CNA macOS (Apple) Fixed in 12.0
  • Fix · CNA macOS (Apple) Fixed in 8.1
  • Fix · CNA macOS (Apple) Fixed in 15.1

Red Hat 2 advisories

  • RHSA-2025:10364 Released 2025-07-07 · Red Hat rating Important
    webkitgtk4 security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4-2.48.3-2.el7_9, webkitgtk4-devel-2.48.3-2.el7_9, webkitgtk4-jsc-2.48.3-2.el7_9 +1
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-devel-2.48.3-2.el7_9, webkitgtk4-doc-2.48.3-2.el7_9, webkitgtk4-jsc-devel-2.48.3-2.el7_9
  • RHSA-2022:1777 Released 2022-05-10 · Red Hat rating Moderate
    webkit2gtk3 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3-2.34.6-1.el8, webkit2gtk3-devel-2.34.6-1.el8, webkit2gtk3-jsc-2.34.6-1.el8 +1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apple macOS 12.0

    45 records Highest priority Priority CRITICAL 1 CRITICAL, 3 MEDIUM, 41 LOW

    Other records, highest priority first

    • TI-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11258 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11371 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    Show all 45 records →
  • Release ·

    Apple iOS and iPadOS 15.1

    21 records Highest priority Priority CRITICAL 1 CRITICAL, 1 MEDIUM, 19 LOW

    Other records, highest priority first

    • TI-2021-11267 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11258 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11286 Out-of-bounds write in Apple iOS and iPadOSPriority LOW 37
    Show all 21 records →
Show 3 more groups
  • Release ·

    Apple macOS 15.1

    15 records Highest priority Priority CRITICAL 1 CRITICAL, 1 MEDIUM, 13 LOW

    Other records, highest priority first

    • TI-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11258 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11286 Out-of-bounds write in Apple iOS and iPadOSPriority LOW 37
    Show all 15 records →
  • Release ·

    Apple macOS 8.1

    14 records Highest priority Priority CRITICAL 1 CRITICAL, 1 MEDIUM, 12 LOW

    Other records, highest priority first

    • TI-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11258 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11286 Out-of-bounds write in Apple iOS and iPadOSPriority LOW 37
    Show all 14 records →
  • Release ·

    Apple iOS and iPadOS 14.8

    12 records Highest priority Priority CRITICAL 2 CRITICAL, 1 MEDIUM, 9 LOW

    Other records, highest priority first

    • TI-2021-11267 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11224 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    Show all 12 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2022:1777
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2025:10364
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2025:10364
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-30888

References

Other 6

  • TI-2022-06888 Use after free in Apple Safari CVSS 3.1HIGH 8.8
  • TI-2022-06876 Out-of-bounds write in Apple Safari CVSS 3.1HIGH 8.8
  • TI-2024-15360 Incorrect authorization in Apple iOS and iPadOS CVSS 3.1CRITICAL 9.1
  • TI-2021-01529 Apple iOS and iPadOS: A remote attacker may be able to cause unexpected application… CVSS 3.1CRITICAL 9.8
  • TI-2021-01509 Out-of-bounds write in Apple iOS and iPadOS CVSS 3.1CRITICAL 9.8
  • TI-2021-01508 Out-of-bounds write in Apple iOS and iPadOS CVSS 3.1CRITICAL 9.8
See all 88 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences