CVE-2023-29298 is an improper access control vulnerability in Adobe ColdFusion. CISA added it to the Known Exploited Vulnerabilities catalogue on 20 July 2023, which means attackers have used it in real attacks. Adobe ColdFusion contains an improper access control vulnerability that allows for a security feature bypass.
What this vulnerability means in Adobe ColdFusion
Improper access control means the product fails to enforce an access boundary consistently, so a requester can reach functionality that should have remained restricted. In Adobe ColdFusion, that matters because access control bugs often sit on paths that influence administrative functions, data handling, or feature enforcement, which can turn a single bypass into a much larger compromise surface. For the canonical record and product context, refer to the CVE Program and the NIST National Vulnerability Database.
Because CISA added this CVE to the Known Exploited Vulnerabilities catalogue on 20 July 2023, the practical assumption should be that exploitation is not theoretical. Security feature bypasses are especially dangerous in middleware and application platforms because they can expose management actions, weaken authorization checks, or open routes to follow-on compromise without needing a password prompt or obvious exploit chain.
How organisations assess exposure
Exposure review starts with a complete asset inventory: which servers run Adobe ColdFusion, where they are deployed, and whether any instances are reachable from the internet or from less trusted network segments. That inventory should be matched against the vendor advisory and the KEV listing so teams can determine whether any instance is still in a potentially exploitable state and whether compensating controls are needed while remediation is scheduled.
Teams should also look for indirect exposure, not just direct service reachability. ColdFusion often supports business applications, so an apparently internal-only instance may still be effectively exposed through reverse proxies, application gateways, partner links, or administrative interfaces. The most useful question is not only whether the product exists, but whether an attacker can reach the affected access-control path.
Remediation and compensating controls
When a patch cannot be applied immediately, the response should focus on reducing reachability and narrowing trust. That usually means limiting who can access the vulnerable ColdFusion instance, segmenting it away from general user traffic, restricting administrative paths, and removing any unnecessary exposure to the public internet. If the application is business-critical, compensating controls should be treated as temporary risk reduction, not a substitute for vendor remediation.
Because access-control flaws can be abused quietly, organisations should also review whether the affected server can be isolated from sensitive back-end systems until the issue is fixed. Where the platform is part of a broader application stack, it is worth checking whether adjacent credentials, service links, or privileged functions could be reached if the access boundary is bypassed.
Detection, validation, and post-incident review
Detection should look for unusual requests against ColdFusion management or feature paths, unexpected success on actions that normally require stronger authorization, and anomalous changes in application behaviour after the vulnerable component is touched. If compromise is suspected, teams should validate whether any administrative actions, configuration changes, or data access events occurred during the exposure window.
After patching, review logs and application telemetry for signs that the weakness was already used before remediation. For an access-control bypass, the important follow-up is not only whether the software is now fixed, but whether an attacker used the bypass to alter configuration, access data, or plant persistence that survives the patch.
Risk and Threat Considerations
This kind of flaw is dangerous because attackers do not need to break encryption or guess credentials if they can simply bypass the gate that was supposed to stop them. In practice, improper access control can expose administrative functions, sensitive data, or downstream services that trust the application too much.
Failure mechanism: The application enforces an access rule incorrectly or incompletely, allowing an unauthorised requester to reach a protected function or resource.
Impact: Attackers may gain unauthorized access, modify application state, or use the bypass as an entry point for broader compromise of the hosted environment.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
CIS Controls v8 and NIST SP 800-53 Rev 5 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| CIS Controls v8 | CIS-4 — Secure Configuration of Enterprise Assets and Software | Improper access control is reduced by hardening exposed software and interfaces. |
| CIS-12 — Network Infrastructure Management | Network segmentation limits reachability to vulnerable application services. | |
| Recommendation — Harden ColdFusion deployments and remove unnecessary exposure paths. Segment ColdFusion services away from untrusted network paths. | ||
| NIST SP 800-53 Rev 5 | AC-3 — Access Enforcement | This CVE is an access-control bypass, so enforcement of authorised access is central. |
| SI-2 — Flaw Remediation | The vulnerability requires timely remediation and validation after exposure. | |
| AU-6 — Audit Record Review, Analysis, and Reporting | Post-patch review depends on log analysis for signs of exploitation. | |
| Recommendation — Enforce access decisions on the affected ColdFusion functions. Remediate the ColdFusion flaw and verify the fix is effective. Review logs for abuse of the bypass and follow-on actions. | ||
Practitioner Guidance
Why practitioners should care: Treat this CVE as an exposure-management issue, not just a software-version problem. If a ColdFusion instance is business-critical, the decision is about how quickly you can reduce reachable attack surface and whether the application can safely remain online during remediation.
What to watch for: Pay close attention to public-facing deployments, administrative interfaces, and any instance that sits near privileged back-end systems. If the affected server supports multiple applications or shared services, a single access-control bypass can have consequences well beyond the product boundary.