CVE-2023-21717: Microsoft SharePoint Server Elevation of Privilege Vulnerability
Modified
Published 14-02-2023Last modified 19-08-2026
Vulnerability summary
CVE-2023-21717 is a high (CVSS 8.8) Improper Access Control vulnerability in microsoft microsoft sharepoint enterprise server 2013 service pack 1. EPSS estimates a 1.09% chance of exploitation in the next 30 days, higher than 65.2% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (CVE.org)EPSS score
1.09%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded
Timeline
- 14-02-2023PublishedVulnerability first disclosed.
- 19-08-2026Last modifiedVulnerability information updated.
Description
Microsoft SharePoint Server Elevation of Privilege Vulnerability
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.09%
Chance of exploitation in the next 30 days
Percentile
65%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.09% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft8 products
- microsoft sharepoint enterprise server 2013 service pack 1≥ 15.0.0, < 15.0.5529.1000
- microsoft sharepoint enterprise server 2016≥ 16.0.0, < 16.0.5383.1000
- microsoft sharepoint foundation 2013 service pack 1≥ 15.0.0, < 15.0.5529.1000
- microsoft sharepoint server 2019≥ 16.0.0, < 16.0.10395.20001
- microsoft sharepoint server subscription edition≥ 16.0.0, < 16.0.15601.20478
1 vendor · 8 products
