CVE-2026-53698: Silverpeas Personal Space Path Traversal Vulnerability

Technical summary

CVE-2026-53698 is a path traversal vulnerability (CWE-36) in Silverpeas through version 6.4.6. When the Personal space feature is selected and the componentId parameter is absent or null, the application fails to properly validate and restrict file path access. An authenticated user can craft requests that traverse or access personal space directories beyond their intended scope. The vulnerability is reachable via network attack surface, requires low attack complexity, and demands authenticated access. It permits confidentiality breach (high impact) without affecting integrity or availability.

Business impact

For organizations running Silverpeas as a document management or team collaboration hub, this vulnerability creates data leakage risk. Employees or contractors with valid accounts could access colleagues' or other teams' personal workspace documents, potentially exposing confidential materials, intellectual property, or personal information. The confidentiality breach could trigger compliance violations (GDPR, HIPAA, SOX) if sensitive regulated data is exposed. Damage is contained to individual user accounts rather than system-wide compromise, but the ease of exploitation and multi-tenant nature of typical Silverpeas deployments elevates the practical business risk.

Affected systems

Silverpeas versions up to and including 6.4.6 are affected. Organizations should verify their deployed version and check the vendor's security advisory for confirmation of affected version ranges and available patches. Verify against official Silverpeas release notes or vendor guidance for patched versions.

Exploitability

Exploitation requires an attacker to hold valid Silverpeas user credentials—no special privileges are needed beyond normal authenticated access. Attack complexity is low: the attacker does not need to manipulate browser behavior or exploit race conditions. Requests can be automated. However, the attacker cannot exploit this vulnerability without first obtaining legitimate login credentials, which moderately constrains opportunistic attack scenarios.

Remediation

Update Silverpeas to a patched version released after the vulnerability disclosure. Verify against the official Silverpeas security advisory for recommended patch versions. In the interim, apply network-level access controls to restrict Silverpeas administrative or API endpoints to trusted IP ranges, and review user access logs for suspicious requests to personal workspace endpoints.

Patch guidance

Consult the official Silverpeas vendor security advisory for patch availability and recommended versions. Apply patches to all Silverpeas instances in your environment. After patching, verify that Personal space feature access controls are correctly enforced by conducting basic smoke tests to confirm that authenticated users can only access their own personal workspace data.

Detection guidance

Monitor application logs for authenticated requests to personal workspace endpoints where the componentId is missing, null, or malformed. Look for repeated failed access attempts to other users' personal space directories. Implement a Web Application Firewall (WAF) rule to block requests with absent or suspicious componentId parameters in Personal space API calls. Use SIEM correlation to flag user accounts making cross-boundary personal space requests in short timeframes.

Why prioritize this

Although the CVSS score is medium (6.5) and the vulnerability does not appear on the CISA Known Exploited Vulnerabilities list, the authentication requirement and confidentiality-only impact prevent higher urgency. However, organizations should prioritize patching if they operate Silverpeas in environments handling sensitive multi-user collaboration data. Multi-tenant deployments where personal workspaces contain compliance-relevant documents warrant faster remediation timelines.

Risk score, explained

The CVSS 3.1 score of 6.5 reflects a network-reachable, low-complexity path traversal that requires authentication but yields high confidentiality impact. The score appropriately downgrades from critical because integrity and availability are unaffected and exploitation requires valid credentials. For organizations with data sensitivity concerns or strict user-isolation requirements, internal risk scoring may elevate this beyond the CVSS base score.

Frequently asked questions