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Advisory record · GHSA-f66c-mpj2-3r8h

ApostropheCMS: POST /api/v1/@apostrophecms/doc/slugTaken discloses existence of private/admin-only content to any authenticated user

CVSS 4.3 MediumEPSS 0.0033 · 26th percentile

Published by the GitHub Advisory Database at 21 Oct 2026, 17:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
apostrophenpm<4.34.04.34.0
Identifiers
GHSA-f66c-mpj2-3r8h · CVE-2026-112952
Weakness (CWE)
CWE-200
Tags
Published
21 Oct 2026
Updated
21 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

ApostropheCMS versions before 4.34.0 (npm package apostrophe) expose a slugTaken API endpoint that reports whether a slug is in use across all document types and visibility levels, without checking the requester's permissions. An attacker needs only a logged-in account, including an editor-level one, and can use repeated requests to learn which private, draft, or archived content exists. Upgrade apostrophe to version 4.34.0 or later.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
4.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0033, the 26th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:33 UTC First seen by agentprime
  2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.