CVE-2026-105650: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in TryGhost Ghost
Description
A cross-site scripting (XSS) vulnerability exists in TryGhost Ghost CMS versions from 2.5.0 up to but not including 6.64.0. This flaw allows attacker-controlled URLs embedded in post content to store untrusted scripts that execute in the Ghost editor, published sites, and newsletter emails. Exploitation could lead to compromise of a staff user's admin session. The issue is fixed in version 6.64.0.
CVSS v3.1
Score 8.1high
Affected software
TryGhost
Ghost
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-105650 is a CWE-79 (Improper Neutralization of Input During Web Page Generation) vulnerability in the Ghost content management system. From versions 2.5.0 through 6.63.x, embedding URLs from attacker-controlled websites could result in stored cross-site scripting. This enables execution of malicious scripts in multiple contexts including the Ghost editor, published web pages, and newsletters. The vulnerability allows potential compromise of administrative sessions. The vendor fixed the issue in version 6.64.0.
Potential Impact
Successful exploitation can lead to execution of arbitrary scripts in the context of the Ghost editor, published site, and newsletter emails. This may result in compromise of staff user admin sessions, leading to unauthorized administrative access. The vulnerability has a high CVSS score of 8.1, indicating significant confidentiality and integrity impact but no availability impact.
Mitigation Recommendations
Upgrade Ghost to version 6.64.0 or later, where this vulnerability is fixed. No other mitigations are specified. Since this is not a cloud service, users must apply the update themselves.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-05T16:40:39.613Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac3f8302cdf04f6563003e1
Added to database: 10/05/2026, 19:19:12 UTC
Last enriched: 10/05/2026, 19:33:25 UTC
Last updated: 10/05/2026, 19:34:03 UTC
Views: 8
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.