Improper Authorization Affecting ghost package, versions >=4.22.0 <6.54.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published11 Aug 2026
- disclosed4 Aug 2026
- creditPedro Pinho
Introduced: 4 Aug 2026
NewCVE-2026-70589 (opens in a new tab)How to fix?
Upgrade ghost to version 6.54.1 or higher.
Overview
ghost is a publishing platform
Affected versions of this package are vulnerable to Improper Authorization in RouterController._getSubscriptionCheckoutData through the subscription offer redemption flow in core/server/controllers/router.js. An attacker can redeem an archived or otherwise inactive subscription offer by submitting its offerId during checkout. This lets users obtain subscription benefits from offers that are no longer active, bypassing the intended offer lifecycle and allowing expired or archived promotions to be redeemed.
Notes
- The vulnerable path accepts any offer object returned by
offersAPI.getOffer; the inactive-offer check is only relevant when the offer record still carries astatusfield, so offers without a status value were not constrained by this validation point.