CVE-2023-35813

CRITICAL EXPLOITED NUCLEI

Sitecore Experience Manager, Experience Platform, Experience Commerce < 10.3 - Remote Code Execution

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2023-35813 has been observed exploited in the wild (reported by VulnCheck KEV). EIP tracks 5 public exploits from researchers including aalexpereira, BagheeraAltered, her3ticAVI. A Nuclei detection template is also available.

AI-analyzed exploit summary This Go-based exploit targets CVE-2023-35813, a vulnerability in Sitecore's XAML parsing functionality. It sends crafted HTTP requests to trigger arbitrary code execution via deserialization, then attempts to dump database connection strings.

Description

Multiple Sitecore products allow remote code execution. This affects Experience Manager, Experience Platform, and Experience Commerce through 10.3.

Exploits (5)

nomisec WORKING POC 8 stars
by aalexpereira · remote
https://github.com/aalexpereira/CVE-2023-35813

This Go-based exploit targets CVE-2023-35813, a vulnerability in Sitecore's XAML parsing functionality. It sends crafted HTTP requests to trigger arbitrary code execution via deserialization, then attempts to dump database connection strings.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Sitecore CMS (versions affected by CVE-2023-35813)
No auth needed
Prerequisites: Network access to the target Sitecore instance · Vulnerable endpoint exposed (/sitecore_xaml.ashx)
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 5 stars
by BagheeraAltered · remote
https://github.com/BagheeraAltered/CVE-2023-35813-PoC

This PoC exploits CVE-2023-35813, a critical RCE vulnerability in Sitecore's XAML parser. It encodes a command via a custom URL encoding scheme and sends it to a vulnerable endpoint to achieve remote code execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Sitecore (specific version not specified)
No auth needed
Prerequisites: Vulnerable Sitecore instance · Network access to the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec SCANNER 3 stars
by her3ticAVI · infoleak
https://github.com/her3ticAVI/CVE-2023-35813

This repository contains a scanner for CVE-2023-35813, which checks if a Sitecore instance is vulnerable by analyzing the server's response header for a specific modification. The script sends a crafted payload to the target and checks if the response contains a specific Content-Type header.

Classification
Scanner 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Sitecore
No auth needed
Prerequisites: Network access to the target Sitecore instance
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC
by nmlz · poc
https://github.com/nmlz/CVE-2023-35813_PoC

This repository contains a functional exploit PoC for CVE-2023-35813, targeting a Sitecore XAML deserialization vulnerability. The exploit sends a crafted POST request to trigger remote code execution via the `__PARAMETERS` field.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Sitecore XP (versions affected by CVE-2023-35813)
No auth needed
Prerequisites: Network access to the target Sitecore instance · Vulnerable Sitecore XP version
devstral-2 · analyzed May 28, 2026 Full analysis →
nomisec WORKING POC
by Rezy-Dev · remote
https://github.com/Rezy-Dev/CVE-2023-35813

This is a functional PoC for CVE-2023-35813, a Sitecore RCE vulnerability. It demonstrates content type and status code injection via crafted payloads, with detailed response analysis and credential highlighting.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Sitecore
No auth needed
Prerequisites: Network access to the target Sitecore instance · Vulnerable Sitecore version
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Nuclei Templates (1)

Sitecore - Remote Code Execution
CRITICALby DhiyaneshDk,iamnoooob
Shodan: title:"Sitecore" || http.title:"sitecore"
FOFA: title="sitecore"

References (1)

Core 1
Core References

Scores

CVSS v3 9.8
EPSS 0.8550
EPSS Percentile 99.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

VulnCheck KEV 2024-01-22
CWE
CWE-94
Status published
Products (4)
sitecore/experience_commerce 8.2 - 10.3
sitecore/experience_manager 8.2 - 10.3
sitecore/experience_platform 8.2 - 10.3
sitecore/managed_cloud 8.2 - 10.3
Published Jun 17, 2023
Tracked Since Feb 18, 2026