Security readout for executives and security teams
Plain-English summary
This flaw is a high-severity Chrome browser memory-safety issue. A malicious web page could potentially corrupt memory in Blink XSLT and compromise a user’s browser if they visit it. The source bundle identifies affected Chrome versions as before 91.0.4472.164.
Executive priority
Prioritize remediation as a high browser-risk item, especially for exposed user workstations. The issue can be triggered through web content, but the bundle does not show confirmed active exploitation.
Technical view
CVE-2021-30560 is a CWE-416 use-after-free in Blink XSLT. The CVSS 3.1 score is 8.8 with network attack vector, low complexity, no privileges required, and user interaction required. Google fixed Chrome in 91.0.4472.164.
Likely exposure
Organizations are exposed where managed or unmanaged Chrome installations remain below 91.0.4472.164. Debian and Gentoo references indicate downstream tracking, but the provided affected-product data only explicitly names Google Chrome.
Exploitation context
The bundle describes exploitation via a crafted HTML page and heap corruption. User interaction is required. The CVE is not marked KEV, and the provided sources do not establish active exploitation.
Researcher notes
Focus validation on Chrome version state and package advisories. Avoid assuming broader affected software beyond the bundle. The key technical concern is use-after-free memory corruption in Blink XSLT with full CIA impact in CVSS.
Mitigation direction
- Update Google Chrome to 91.0.4472.164 or later.
- Prioritize managed browser fleets and high-risk user groups.
- Check Debian and Gentoo advisories if those packages are in scope.
- Follow current vendor guidance where package applicability is unclear.
Validation and detection
- Inventory Chrome versions across endpoints.
- Confirm no Chrome installations remain below 91.0.4472.164.
- Review vulnerability scanner findings for CVE-2021-30560.
- Map Debian and Gentoo advisory relevance to deployed systems.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-30560 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://chromereleases.googleblog.com/2021/07/stable-channel-update-for-desktop.htmlCVE reference
- https://crbug.com/1219209CVE reference
- DSA-5216CVE reference · vendor-advisory
- [debian-lts-announce] 20220909 [SECURITY] [DLA 3101-1] libxslt security updateCVE reference · mailing-list
- GLSA-202310-23CVE reference · vendor-advisory
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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.