Security Resilience

CVE-2023-21719

Access Control in Microsoft Edge Chromium ≤ 109.0.1518.70

Published
24 January 2023
Modified
28 February 2025
Patch / advisory
CVSS Score v3.1 6.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS Score 0.017 77th percentile
Risk Priority 60 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-21719 is a medium-severity Incorrect Authorization (CWE-863) vulnerability in Microsoft Edge Chromium. Its CVSS base score is 6.5 (Medium).

Operationally, ranked in the top 23% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

Microsoft Edge (Chromium-based) is affected by CVE-2023-21719, a security feature bypass vulnerability published on 2023-01-24 and assigned a CVSS 3.1 score of 6.5 with the vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N. The flaw is categorized under CWE-863 for incorrect authorization.

An unauthenticated remote attacker can trigger the bypass with low attack complexity and only user interaction required, resulting in high confidentiality impact without affecting integrity or availability.

Microsoft Security Response Center advisories and the associated Gentoo Linux security advisory detail mitigation steps and are published at the referenced URLs.

The EPSS score remains flat at a peak and current value of 0.1143.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

CWE(s)

Related Threats

CVEs Like This One

CVE-2023-29334Same product: Microsoft Edge Chromium
CVE-2023-24935Same product: Microsoft Edge Chromium
CVE-2023-33145Same product: Microsoft Edge Chromium
CVE-2023-29354Same product: Microsoft Edge Chromium
CVE-2023-29350Same product: Microsoft Edge Chromium
CVE-2023-29345Same product: Microsoft Edge Chromium
CVE-2023-24892Same product: Microsoft Edge Chromium
CVE-2023-21796Same product: Microsoft Edge Chromium
CVE-2023-21794Same product: Microsoft Edge Chromium
CVE-2023-21720Same product: Microsoft Edge Chromium

Affected Assets

microsoft
edge chromium
≤ 109.0.1518.70

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-863

Periodic review and update of procedures reduces incorrect authorization implementations over time.

addresses: CWE-863

Supervision identifies cases where authorization logic incorrectly permits unauthorized actions.

addresses: CWE-863

Defining permitted attribute values and auditing modifications reduces the chance of incorrect authorization outcomes due to tampered or missing labels.

addresses: CWE-863

The authorization process and usage restrictions help prevent incorrect authorization for remote access types.

addresses: CWE-863

Establishing configuration and connection requirements helps ensure correct rather than incorrect authorization for wireless access.

addresses: CWE-863

Establishing connection authorization processes for mobile devices helps ensure authorization decisions are correctly implemented rather than incorrect.

addresses: CWE-863

Monitoring account use, notifying on changes, and reviewing accounts for compliance corrects incorrect authorization assignments.

addresses: CWE-863

Ensures authorization decisions for external system use are correctly implemented and enforced.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

blocks

Requiring consistency between access rights and classification plus formal approval steps ensures that the authorization logic correctly distinguishes between entities that should and should not be granted access.

blocks

A.5.18's provisioning, revocation, review and adjustment of access rights (incl. before role changes/termination, with segregation and owner approval) directly stops incorrect authorization decisions from being exploitable in the vast majority of cases; the bounded remainder is incorrectness inside the authorization logic itself (e.g. flawed conditional or missing check) rather than rights that were wrongly granted.

blocks

A.8.3 directly mandates restricting access to information per policies via configuration, identity/group controls, isolation, and dynamic techniques that enforce correct authorization decisions, addressing most but not all slices of CWE-863 (e.g., remainder in non-access-decision authorization errors like timing or environmental factors).

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-863, a class-level weakness, and none of its children carries one either.

References