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CVE-2023-21717

No known exploitation. EPSS puts it in the 66th percentile. Fixed versions are out.

CVSS 3.18.8HighEPSS percentile66th1.1% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products4 fixed builds listed below
Check it yourself

OpenVAS · 6 checks

e.g. OID 1.3.6.1.4.1.25623.1.0.821365

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Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Microsoft SharePoint Enterprise Server 2013 Service Pack 1Affected: ≥ 15.0.0, < 15.0.5529.1000Upgrade to: 15.0.5529.1000Stated by: CVE record
  • Microsoft SharePoint Enterprise Server 2016Affected: ≥ 16.0.0, < 16.0.5383.1000Upgrade to: 16.0.5383.1000Stated by: CVE record
  • Microsoft SharePoint Foundation 2013 Service Pack 1Affected: ≥ 15.0.0, < 15.0.5529.1000Upgrade to: 15.0.5529.1000Stated by: CVE record
  • Microsoft SharePoint Server 2019Affected: ≥ 16.0.0, < 16.0.10395.20001Upgrade to: 16.0.10395.20001Stated by: CVE record
  • Microsoft SharePoint Server Subscription EditionAffected: ≥ 16.0.0, < 16.0.15601.20478Upgrade to: 16.0.15601.20478Stated by: CVE record

Versions as the sources state them. 2 more products have version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

Microsoft SharePoint Server Elevation of Privilege Vulnerability

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS66th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

1.1% chance of exploitation activity in the next 30 days, which ranks it in the 66th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

9 events over 1282 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. OpenVAS check added
  3. EPSS band changemoderate → low
  4. EPSS band changelow → moderate
  5. Patch availablerecord updated
  6. Publishedweakness classified

Affected products

And 5 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Scored 8.8 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

Sources

References in the record

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