Security readout for executives and security teams
CVE-2021-30890 is a web content handling flaw affecting Apple platforms. If a device processes maliciously crafted web content, normal website isolation may be bypassed through universal cross-site scripting. Vendor fixes are listed, but the bundle provides no CVSS score and no active exploitation evidence. Exposure is most likely on Apple devices or WebKit-based software stacks that had not received the listed 2021 security updates. The bundle does not provide exact vulnerable version ranges beyond fixed releases. Treat this as a high-priority patch hygiene issue for older Apple and WebKit-based environments. There is no cited active exploitation, but universal cross-site scripting can undermine browser trust boundaries and expose users to data theft or session abuse. Mitigation focus: Update Apple platforms to the listed fixed releases or later.; Review WebKitGTK/WPE, Debian, and Fedora advisories for applicable package updates.; Prioritize managed browsers, mobile devices, and shared browsing hosts..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2021-30890 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://support.apple.com/en-us/HT212869CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212867CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212874CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212876CVE reference · x_refsource_MISC
- DSA-5030CVE reference · vendor-advisory, x_refsource_DEBIAN
- DSA-5031CVE reference · vendor-advisory, x_refsource_DEBIAN
- FEDORA-2022-25a98f5d55CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2022-f7366e60cbCVE reference · vendor-advisory, x_refsource_FEDORA
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.