Security readout for executives and security teams
Plain-English summary
CVE-2026-24778 is a high-severity cross-site scripting issue in Ghost Portal preview links. A malicious link could run JavaScript as an authenticated staff user or member, potentially enabling account takeover. The issue requires user interaction and affects specified Ghost 5.x/6.x and Portal versions.
Executive priority
Prioritize remediation for public Ghost sites, especially those with administrative staff workflows or paid membership features. This is not confirmed as actively exploited in the provided sources, but account takeover potential makes timely patching important.
Technical view
The vulnerability is CWE-79 XSS in Ghost Portal preview link handling. A network attacker with no prior privileges could craft a link that executes script when an authenticated staff user or member opens it. Affected ranges are Ghost >=5.43.0 <5.121.0, Ghost >=6.0.0 <6.15.0, Portal >=2.29.1 <2.51.5, and Portal >=2.52.0 <2.57.1.
Likely exposure
Internet-facing Ghost sites with staff or member authentication are the primary concern, especially where users may click external links. Customized or self-hosted Portal deployments need special review because they may not receive the CDN-loaded patched Portal automatically.
Exploitation context
The CVSS 3.1 score is 8.8, with low attack complexity and user interaction required. The source bundle does not indicate CISA KEV listing or active exploitation. The practical risk is phishing-style delivery to authenticated Ghost staff or members.
Researcher notes
The advisory ties remediation to Ghost releases that load patched Portal versions: v5.121.0 loads Portal v2.51.5, and v6.15.0 loads Portal v2.57.1. Avoid assuming CDN protection for customized or self-hosted Portal; validate the actual deployed bundle.
Mitigation direction
- Upgrade Ghost 5.x to v5.121.0 or later.
- Upgrade Ghost 6.x to v6.15.0 or later.
- Ensure Portal is at v2.51.5 or v2.57.1 or later, as applicable.
- For customized or self-hosted Portal, manually rebuild or update to the latest patched version.
- Review Ghost vendor advisory for deployment-specific guidance.
Validation and detection
- Inventory Ghost and @tryghost/portal versions across all production and staging sites.
- Confirm Ghost 5.x installations are v5.121.0 or later.
- Confirm Ghost 6.x installations are v6.15.0 or later.
- Confirm self-hosted or customized Portal bundles use patched Portal versions.
- Review logs and reports for suspicious links targeting authenticated staff or members.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-24778 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/TryGhost/Ghost/security/advisories/GHSA-gv6q-2m97-882hCVE reference · x_refsource_CONFIRM
- https://github.com/TryGhost/Ghost/commit/da858e640e88e69c1773a7b7ecdc2008fa143849CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.