Security readout for executives and security teams
Plain-English summary
CVE-2021-30519 is a memory safety flaw in Google Chrome's Payments component. A successful attack required convincing a user to install a malicious payments app and then interact with a crafted HTML page. The public sources show it was fixed in Chrome 90.0.4430.212, with no KEV listing or sourced active exploitation claim.
Executive priority
Treat this as a browser update compliance issue with moderate urgency. It is memory-corruption capable, but public evidence shows user-action prerequisites and no cited active exploitation. Focus on confirming browser update coverage rather than emergency incident response unless local telemetry indicates suspicious activity.
Technical view
The CVE describes a use-after-free in Chrome Payments before 90.0.4430.212 that could lead to heap corruption through crafted HTML after malicious payments app installation. Public metadata does not provide CVSS, CWE, exploit details, or broad exploitation evidence. Fedora and Gentoo advisories indicate downstream package update relevance.
Likely exposure
Exposure is most likely on endpoints running Google Chrome earlier than 90.0.4430.212. Linux environments using distribution-managed browser packages should also check Gentoo or Fedora advisories where applicable. Systems already updated beyond the fixed Chrome version are unlikely to remain exposed to this specific issue.
Exploitation context
The attack path is not drive-by in the CVE text; it requires user persuasion to install a malicious payments app plus a crafted HTML page. KEV is false in the supplied bundle, and no cited source states active exploitation. Evidence is incomplete for exploit availability or real-world targeting.
Researcher notes
Key gaps are missing CVSS, CWE, and public bug details. The crbug reference may be restricted. Validation should center on version evidence and package advisory status. Avoid assuming affected products beyond Chrome and cited downstream advisories without additional vendor data.
Mitigation direction
- Update Google Chrome to 90.0.4430.212 or later.
- Apply relevant Gentoo or Fedora browser package advisories where applicable.
- Check vendor guidance for any additional supported remediation.
- Restrict untrusted payments app installation where policy allows.
- Prioritize managed browser auto-update enforcement on endpoints.
Validation and detection
- Inventory Chrome versions across managed endpoints.
- Confirm all Chrome installs are at least 90.0.4430.212.
- Check Linux package manager status against cited distribution advisories.
- Review browser app installation controls for unmanaged exceptions.
- Monitor vulnerability tooling for CVE-2021-30519 detections.
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.
CVE-2021-30519 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
- 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://chromereleases.googleblog.com/2021/05/stable-channel-update-for-desktop.htmlCVE reference · x_refsource_MISC
- https://crbug.com/1194058CVE reference · x_refsource_MISC
- GLSA-202107-06CVE reference · vendor-advisory, x_refsource_GENTOO
- FEDORA-2021-f94dadff78CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-ca58c57bdfCVE 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.