Authentication Bypass in Microsoft OneNote (CVE-2023-21721)
Summary
Authentication bypass in Microsoft OneNote (CVE-2023-21721). Data can be tampered with by attackers.
Original description
The description as published by the source.
Microsoft OneNote Elevation of Privilege Vulnerability
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A weakness called CVE-2023-21721 was discovered in Microsoft OneNote.
In plain terms, it is an authentication weakness that allows impersonation.
Severity is Medium (CVSS 6.5/10). Exploitation requires specific conditions but can cause real harm if successful.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "Microsoft OneNote CVE-2023-21721".
CVE-2023-21721 (Microsoft OneNote). Severity: Medium / CVSSv3 6.5. Category: CWE-287.
Response plan:
- Check the vendor advisory for affected versions and the patched release.
- If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
- If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
- Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
A weakness (CVE-2023-21721) in Microsoft OneNote. In plain words, it is an authentication weakness that allows impersonation.
Target versions of Microsoft OneNote (see vendor advisory). If running in production, identify exposure immediately.
Severity: Medium (CVSS 6.5/10). Exploitation requires specific conditions but can cause real harm if successful.
Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-287)
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
References
- patch msrc.microsoft.com