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Measure print-management servers and software artifact repositories as separate asset classes, then compare them against the same governance questions: what is reachable, why it must be reachable, who can change it, whether it is supported and patched, how integrity is protected, and whether suspicious activity can be detected and investigated. An internet-reachable system is not automatically vulnerable, and a vulnerability is not proof of compromise.
Why these two systems belong in an attack-surface review
Print-management servers coordinate queues, drivers, scripts, and related settings. Artifact repositories store or proxy the packages, container images, and other build inputs that teams publish and consume. Their functions and threat paths differ, but both can have privileged access and dependencies that extend beyond the server itself.
The practical goal is not to rank one category as riskier than the other. It is to establish what assets exist, determine how they can be reached and changed, and verify that controls match their operational role. No validated cross-category score or population-wide exposure comparison is established by the cited guidance and incident reporting; a combined number would need a documented method for weighting unlike controls and evidence quality.
Build an inventory that shows reachability and ownership
Print-management systems
Inventory print-management application servers and associated services. For each asset, record its product and version, owner, network zone, administrative interfaces, dependencies, and support status. Map observed reachability separately for the public internet, partner networks, user segments, and management enclaves; do not substitute an assumed network design for a verified path.
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Artifact repositories and connected systems
Include hosted and proxy repositories, package feeds, container registries, image stores, service accounts, automation clients, and build and deployment integrations. Count provider-hosted services as well as internal instances. Map which teams and build agents can read, publish, overwrite, delete, or promote each type of artifact.
Track discovery confidence alongside the inventory: confirmed assets, likely but unconfirmed assets, and systems with unknown owners or status. A discovery scan can reveal internet-connected assets, but it is not a complete inventory by itself. CISA’s Internet Exposure Reduction Guidance, published June 4, 2025, advises organizations to assess their internet exposure and use asset-discovery resources where useful; it does not endorse one discovery tool.
Decide whether each reachable path is necessary
For every externally reachable system, document the business need, service owner, intended users, supported workflow, and accepted exposure. If public access is unnecessary, remove it or narrow the path. If access must remain, restrict it through measures such as VPN or other access controls, multifactor authentication where available, timely patching, and monitored access. CISA’s guidance recommends identifying internet-accessible assets, deciding which exposure is operationally necessary, reducing what is unnecessary, mitigating what must remain, and reassessing routinely.
For repositories, document whether anonymous or broad read access is intended and whether build systems can obtain dependencies from unapproved sources. Check whether internal teams or projects can bypass the controlled repository path. OWASP’s guidance on software-supply-chain security recommends reviewing artifacts before admission and ensuring teams cannot bypass a private repository when it is intended to control inputs.
Compare the two surfaces using the same governance questions
Use a shared review structure, but preserve the asset-specific evidence. Record the result and supporting evidence for each asset rather than forcing different controls into a single score.
| Review dimension | Print-management server | Artifact repository |
|---|---|---|
| Reachability | Observed public, partner, user-segment, or management-only access paths; source: CISA Internet Exposure Reduction Guidance, June 4, 2025. | Observed access paths to hosted or internal repositories and connected services; source: CISA Internet Exposure Reduction Guidance, June 4, 2025. |
| Operational necessity | Documented business need for each reachable administrative or service path; source: CISA Internet Exposure Reduction Guidance, June 4, 2025. | Documented need for repository reads, publication, and integrations, including whether approved access can be enforced; source: CISA Internet Exposure Reduction Guidance, June 4, 2025, and OWASP software-supply-chain guidance. |
| Identity and privilege | Privileged accounts, service identities, default or shared credentials, authentication paths, MFA coverage, and who can change scripts, synchronization settings, drivers, queues, or configuration; source: CISA/FBI PaperCut advisory, 2023. | Human and machine identities, least privilege, separation of duties, credential storage and rotation, publisher rights, and token lifetime; source: OWASP software-supply-chain guidance. |
| Vulnerability and support state | Product and version, support status, known vulnerabilities, remediation owner, and remediation timing; source: CISA/FBI PaperCut advisory, 2023, and CISA Internet Exposure Reduction Guidance, June 4, 2025. | Repository manager, identity provider, CI/CD integrations, build agents, plugins, and artifact consumers, with support and vulnerability status tracked; source: NIST SP 800-204D, February 12, 2024. |
| Integrity and provenance | Accountability for changes to administration settings, scripts, drivers, and integrations, plus the ability to recover a known-good configuration; source: CISA/FBI PaperCut advisory, 2023. | Artifact admission review, signing and verification, immutable release behavior where supported, approval separation, and traceability to source and build; sources: OWASP software-supply-chain guidance and CISA developer guidance. |
| Detection and response | Authentication, privilege, and configuration events; alerting, log retention, named owner, escalation route, and incident readiness; sources: CISA/FBI PaperCut advisory, 2023, and CISA Internet Exposure Reduction Guidance, June 4, 2025. | Authentication, configuration, publication, deletion, and suspicious access events; monitoring, log retention, named owner, and incident readiness; source: OWASP software-supply-chain guidance. |
| Blast radius | Downstream users, systems, and print workflows that could be affected by a compromised service; assess for each deployment. | Downstream builds and consumers that could receive a changed or untrusted artifact; OWASP notes that supplier compromise can propagate to downstream consumers. |
Measure identity, privilege, and patch status
Review administrative power and credentials
On print systems, count privileged accounts and service identities; identify shared or default credentials, authentication paths, and MFA coverage. Verify who can change print scripts, User/Group Sync settings, drivers, queues, and other configuration. On repository systems, assess human and machine identities separately. Check least privilege, separation of duties, publisher permissions, credential storage and rotation, token lifetime, and who can alter release artifacts. OWASP recommends strong access control, least privilege, MFA, credential rotation, and keeping credentials out of clear text and source control.
Keep exposure, vulnerability, and compromise as separate findings
For each asset, record the product or component version, support status, exposed components, known vulnerabilities, remediation owner, and time to remediate. Use distinct fields for observed exposure, known vulnerability, evidence of exploitability, and confirmed compromise. A reachable service may be patched; a vulnerable service may have no evidence of exploitation; and suspected or confirmed compromise requires its own evidence and response record.
CISA and FBI’s 2023 advisory on CVE-2023-27350 documented exploitation of PaperCut MF and NG servers involving an authentication bypass that could provide administrator access, followed by use of product features for remote code execution. In the configurations described, the PaperCut server process ran with SYSTEM- or root-level privileges, increasing the potential consequences of execution. The advisory’s affected version ranges describe that historical incident and should not be treated as a statement of current product status; verify current vendor security information when assessing a deployment.
The advisory also reported that Education Facilities Subsector entities maintained approximately 68% of exposed, but not necessarily vulnerable, U.S.-based PaperCut servers, citing FBI information. This is a distribution of exposed U.S.-based PaperCut servers in the advisory’s incident context—not a claim that 68% of education-sector servers were vulnerable, that 68% of all print servers were exposed, or that the same distribution holds today.
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Check artifact integrity and build provenance
Repository controls matter even when the repository is not publicly reachable: an authorized identity or an unapproved dependency path can still introduce an artifact into a build. Review how artifacts enter, move through, and leave the repository.
- Determine whether artifacts are reviewed or scanned before admission and whether release artifacts are protected from alteration after approval.
- Check whether signatures are applied and validated before artifacts are used.
- Verify whether provenance records where, when, and how an artifact was produced, identifies a trusted builder, and is generated by the build platform in a way that is difficult to forge.
- Trace artifacts to their source repository, third-party dependencies, build script, and output. CISA developer guidance identifies these as useful build records and calls for retaining build artifacts.
- Separate the ability to upload an artifact from the authority to approve or promote it, where the workflow supports that distinction.
NIST SP 800-204D, published February 12, 2024, treats software-supply-chain security as measures integrated across CI/CD stages such as build, test, package, and deploy. Include the surrounding pipeline components in the review rather than treating the repository as an isolated storage system.
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Verify that logs support investigation and response
For both asset classes, verify that authentication attempts, privilege changes, configuration changes, and suspicious access are logged, centrally monitored, retained, and actionable. For repositories, include artifact publication and deletion events. OWASP recommends logging authentication and configuration events across supply-chain systems, including artifact repositories, and monitoring those logs rather than merely collecting them.
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Check for operational evidence: a named owner, escalation route, patch process, alert coverage, log-retention period, incident playbook, and last review date. For systems that remain exposed, CISA recommends routine exposure assessments and monitoring ingress and egress for anomalous traffic.
Report findings without overstating them
A useful finding says what was observed, how confident the team is, what the evidence establishes, and what action follows. Keep inventory uncertainty visible instead of reporting a scan result as a complete count.
Quick Recap
- Reachability: State the observed path and the date or conditions of observation. Do not label internet visibility as a vulnerability.
- Vulnerability: Name the affected product or component and version evidence, the known issue, and the remediation owner. Do not infer compromise from a vulnerable version alone.
- Compromise: Report only when investigation evidence supports suspected or confirmed compromise; identify the evidence and response status.
- Coverage: Separate confirmed assets from likely or unknown assets so the measured population is clear.
- Risk and priority: Explain operational necessity, reachable identities, integrity controls, downstream impact, and detection readiness. Avoid a single combined score unless its weights, evidence quality, and normalization across unlike controls are documented.
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