Full Report
WatchTowr has found three vulnerabilities in the Sitecore Experience Platform, used by HSBC and L’Oréal
Analysis Summary
# Vulnerability: Chained Flaws in Sitecore Experience Platform Leading to Pre-Authentication RCE
## CVE Details
- CVE ID: Not explicitly stated in the provided text. (Note: The text references multiple vulnerabilities chained together, but no specific CVEs are assigned in this summary extraction.)
- CVSS Score: Not explicitly stated, but the impact suggests a High or Critical score given the RCE outcome.
- CWE: Not explicitly stated.
## Affected Systems
- Products: Sitecore Experience Platform (CMS)
- Versions: Version 10.4.1 (Explicitly mentioned as vulnerable to the RCE chain).
- Configurations: Affected by a default hardcoded administrative password.
## Vulnerability Description
The vulnerability stems from a chain of several flaws discovered by WatchTowr, culminating in Remote Code Execution (RCE). Critically, recent versions of Sitecore shipped with a default, hardcoded administrative password set to **'b'**. This weak default credential, when chained with two separate post-authentication RCE vulnerabilities, allows an unauthenticated attacker to achieve a complete **pre-authentication RCE** on the platform.
## Exploitation
- Status: PoC available (Implied by the nature of the research and disclosure, detailing the chain).
- Complexity: Low for initial unauthorized access due to the default password, leading to a critical final step.
- Attack Vector: Network (Pre-authentication RCE).
## Impact
- Confidentiality: High (Potential full system access).
- Integrity: High (Ability to alter/delete data, deploy malicious code).
- Availability: High (Potential for system disruption or shutdown).
## Remediation
### Patches
- Specific patch versions are not listed in the provided text. Sitecore must release updates to address the underlying RCE flaws and remove the default 'b' password configuration.
### Workarounds
1. **Immediately change the default hardcoded administrative password** from 'b' to a strong, unique password across all Sitecore environments.
2. Review and restrict network access to administrative interfaces to known, trusted IP ranges until patches are applied.
## Detection
- **Indicators of Compromise (IoCs):** Unauthorized configuration changes, presence of unexpected files, or remote login attempts using the default password 'b'.
- **Detection Methods and Tools:** Monitoring authentication logs for logins using the password 'b'. Monitoring application logs for requests targeting the endpoints susceptible to the two post-authentication RCEs once initial access is gained.
## References
- Vendor Advisories: Sitecore Advisory (Search for updates related to Sitecore Experience Platform 10.4.1 vulnerability disclosures circa June 2025).
- Relevant links:
- WatchTowr vulnerability report link (defanged): `labs.watchtowr.com/p/a8ebe565-0fac-4e0a-9e75-f526d4058925`
- Infosecurity Magazine article: `infosecurity-magazine.com/news/chained-flaws-cms-sitecore-rce/`