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CVE-2023-24955: Microsoft SharePoint Server Code Injection Vulnerability

criticalknown exploitedpublic exploitCVE-2023-24955
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Microsoft SharePoint Server contains a code injection vulnerability that allows an authenticated attacker with Site Owner privileges to execute code remotely.

CSIRTS triage

vendor: Microsoftproduct: SharePoint ServerCode injection
What
A code injection vulnerability allows an authenticated attacker to execute code remotely.
Who is affected
Authenticated users with Site Owner privileges on SharePoint Server are affected.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Apply the latest security updates to mitigate the vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2024-03-26
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-24955

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2023-24955coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft SharePoint Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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