CVE-2009-1055: Unspecified vulnerability in the web service in Sitecore CMS 5.3.1 rev.

Security readout for executives and security teams

This issue concerns an old Sitecore CMS web service that could let an authenticated remote user access security databases and obtain administrative or user credentials. The public record does not describe the exact attack path or a CVSS score, but credential exposure makes any still-running affected instance a serious business risk. Exposure is most likely limited to legacy Sitecore CMS 5.3.1 rev. 071114 deployments with the affected web service reachable by authenticated users. The bundle does not prove later versions, hosted variants, or unrelated Sitecore products are affected. Treat this as high priority only where legacy Sitecore 5.3.1 rev. 071114 is present. The main concern is credential theft from security databases, which can enable broader compromise. If no such legacy deployment exists, business exposure is likely low. Mitigation focus: Inventory Sitecore CMS versions and identify any 5.3.1 rev. 071114 systems.; Review Sitecore release notes and vendor guidance for the applicable fixed version.; Restrict access to affected web services to trusted administrative networks..

Prepared

Jun 28, 2026, 11:04 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.