Vulnerability Database

383,371

Total vulnerabilities in the database

CVE-2025-53621 — org.dspace / dspace-api

Improper Restriction of XML External Entity Reference

DSpace open source software is a repository application which provides durable access to digital resources. Two related XML External Entity (XXE) injection possibilities impact all versions of DSpace prior to 7.6.4, 8.2, and 9.1. External entities are not disabled when parsing XML files during import of an archive (in Simple Archive Format), either from command-line (./dspace import command) or from the "Batch Import (Zip)" user interface feature. External entities are also not explicitly disabled when parsing XML responses from some upstream services (ArXiv, Crossref, OpenAIRE, Creative Commons) used in import from external sources via the user interface or REST API. An XXE injection in these files may result in a connection being made to an attacker's site or a local path readable by the Tomcat user, with content potentially being injected into a metadata field. In the latter case, this may result in sensitive content disclosure, including retrieving arbitrary files or configurations from the server where DSpace is running. The Simple Archive Format (SAF) importer / Batch Import (Zip) is only usable by site administrators (from user interface / REST API) or system administrators (from command-line). Therefore, to exploit this vulnerability, the malicious payload would have to be provided by an attacker and trusted by an administrator, who would trigger the import. The fix is included in DSpace 7.6.4, 8.2, and 9.1. Please upgrade to one of these versions. For those who cannot upgrade immediately, it is possible to manually patch the DSpace backend. One may also apply some best practices, though the protection provided is not as complete as upgrading. Administrators must carefully inspect any SAF archives (they did not construct themselves) before importing. As necessary, affected external services can be disabled to mitigate the ability for payloads to be delivered via external service APIs.

CVSS v3:

  • Severity: Medium
  • Score: 6.9
  • AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:N/A:L

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.