CWE-1230 Base Incomplete

Exposure of Sensitive Information Through Metadata

This vulnerability occurs when an application protects the primary source of sensitive data but fails to secure the metadata derived from it. Attackers can then access this secondary information,…

Definition

What is CWE-1230?

This vulnerability occurs when an application protects the primary source of sensitive data but fails to secure the metadata derived from it. Attackers can then access this secondary information, which may leak critical details about the original content.
Developers often focus access controls on the main data repository, like a database, but overlook the traces that data leaves elsewhere. Sensitive information can be exposed through search engine indices, system logs, statistical analytics, file metadata (like timestamps), or cached previews. If these secondary resources aren't locked down with the same rigor, they become a backdoor for information disclosure. Attackers exploit this by piecing together metadata to reconstruct sensitive details. For example, unique search terms might reveal a specific user's records, or file creation dates could expose activity patterns. This indirect data leakage can be just as damaging as direct access, compromising privacy and violating data protection principles.
Real-world impact

Real-world CVEs caused by CWE-1230

No public CVE references are linked to this CWE in MITRE's catalog yet.

How attackers exploit it

Step-by-step attacker path

  1. 1

    Identify a code path that handles untrusted input without validation.

  2. 2

    Craft a payload that exercises the unsafe behavior — injection, traversal, overflow, or logic abuse.

  3. 3

    Deliver the payload through a normal request and observe the application's reaction.

  4. 4

    Iterate until the response leaks data, executes attacker code, or escalates privileges.

Vulnerable code example

Vulnerable pseudo

MITRE has not published a code example for this CWE. The pattern below is illustrative — see Resources for canonical references.

Vulnerable pseudo 
// Example pattern — see MITRE for the canonical references.
function handleRequest(input) {
  // Untrusted input flows directly into the sensitive sink.
  return executeUnsafe(input);
}
Secure code example

Secure pseudo

Secure pseudo 
// Validate, sanitize, or use a safe API before reaching the sink.
function handleRequest(input) {
  const safe = validateAndEscape(input);
  return executeWithGuards(safe);
}
What changed: the unsafe sink is replaced (or the input is validated/escaped) so the same payload no longer triggers the weakness.
Prevention checklist

How to prevent CWE-1230

  • Architecture Use safe-by-default frameworks and APIs that prevent the unsafe pattern from being expressible.
  • Implementation Validate input at trust boundaries; use allowlists, not denylists.
  • Implementation Apply the principle of least privilege to credentials, file paths, and runtime permissions.
  • Testing Cover this weakness in CI: SAST rules + targeted unit tests for the data flow.
  • Operation Monitor logs for the runtime signals listed in the next section.
Detection signals

How to detect CWE-1230

SAST High

Run static analysis (SAST) on the codebase looking for the unsafe pattern in the data flow.

DAST Moderate

Run dynamic application security testing against the live endpoint.

Runtime Moderate

Watch runtime logs for unusual exception traces, malformed input, or authorization bypass attempts.

Code review Moderate

Code review: flag any new code that handles input from this surface without using the validated framework helpers.

Plexicus auto-fix

Plexicus auto-detects CWE-1230 and opens a fix PR in under 60 seconds.

Codex Remedium scans every commit, identifies this exact weakness, and ships a reviewer-ready pull request with the patch. No tickets. No hand-offs.

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Frequently asked questions

Frequently asked questions

What is CWE-1230?

This vulnerability occurs when an application protects the primary source of sensitive data but fails to secure the metadata derived from it. Attackers can then access this secondary information, which may leak critical details about the original content.

How serious is CWE-1230?

MITRE has not published a likelihood-of-exploit rating for this weakness. Treat it as medium-impact until your threat model proves otherwise.

What languages or platforms are affected by CWE-1230?

MITRE lists the following affected platforms: Not OS-Specific, Not Architecture-Specific.

How can I prevent CWE-1230?

Use safe-by-default frameworks, validate untrusted input at trust boundaries, and apply the principle of least privilege. Cover the data-flow signature in CI with SAST.

How does Plexicus detect and fix CWE-1230?

Plexicus's SAST engine matches the data-flow signature for CWE-1230 on every commit. When a match is found, our Codex Remedium agent opens a fix PR with the corrected code, tests, and a one-line summary for the reviewer.

Where can I learn more about CWE-1230?

MITRE publishes the canonical definition at https://cwe.mitre.org/data/definitions/1230.html. You can also reference OWASP and NIST documentation for adjacent guidance.

Related weaknesses

Weaknesses related to CWE-1230

CWE-285 Parent

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CWE-1256 Sibling

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CWE-1297 Sibling

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CWE-1328 Sibling

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CWE-552 Sibling

Files or Directories Accessible to External Parties

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CWE-732 Sibling

Incorrect Permission Assignment for Critical Resource

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CWE-862 Sibling

Missing Authorization

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CWE-863 Sibling

Incorrect Authorization

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CWE-926 Sibling

Improper Export of Android Application Components

This vulnerability occurs when an Android app makes a component (like an Activity, Service, or Content Provider) available to other apps…

Resources

Further reading

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