CVE-2026-104414: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in TryGhost Ghost
Ghost from 2.5.0 before 6.64.0 contains a stored cross-site scripting vulnerability that allows attackers to inject untrusted scripts into post content via oEmbed photo responses. Attackers can host malicious oEmbed photo responses so that embedding their URL stores scripts that run in the Ghost editor, published site, and newsletter emails, compromising staff admin sessions.
AI Analysis
Technical Summary
CVE-2026-104414 is a stored cross-site scripting vulnerability in TryGhost Ghost affecting versions >=2.5.0 and <6.64.0. The vulnerability arises from improper neutralization of input during web page generation, specifically via oEmbed photo responses. Attackers can host malicious oEmbed photo responses that, when embedded, store scripts executing in multiple contexts including the Ghost editor, published site pages, and newsletter emails, leading to compromise of staff admin sessions.
Potential Impact
Successful exploitation allows attackers to execute arbitrary scripts in the context of the Ghost editor, published site, and newsletter emails. This can lead to compromise of administrative sessions, enabling unauthorized actions within the Ghost platform. The vulnerability has a high severity with a CVSS 4.0 score of 8.6, indicating significant risk if exploited.
Mitigation Recommendations
A fix is available in Ghost version 6.64.0 and later. Users should upgrade to version 6.64.0 or newer to remediate this vulnerability. No additional mitigation steps are indicated in the provided data.
CVE-2026-104414: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in TryGhost Ghost
Description
Ghost from 2.5.0 before 6.64.0 contains a stored cross-site scripting vulnerability that allows attackers to inject untrusted scripts into post content via oEmbed photo responses. Attackers can host malicious oEmbed photo responses so that embedding their URL stores scripts that run in the Ghost editor, published site, and newsletter emails, compromising staff admin sessions.
CVSS v4.0
Score 8.6high
Affected software
TryGhost
Ghost
pkg:github/tryghost/GhostRun 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-2026-104414 is a stored cross-site scripting vulnerability in TryGhost Ghost affecting versions >=2.5.0 and <6.64.0. The vulnerability arises from improper neutralization of input during web page generation, specifically via oEmbed photo responses. Attackers can host malicious oEmbed photo responses that, when embedded, store scripts executing in multiple contexts including the Ghost editor, published site pages, and newsletter emails, leading to compromise of staff admin sessions.
Potential Impact
Successful exploitation allows attackers to execute arbitrary scripts in the context of the Ghost editor, published site, and newsletter emails. This can lead to compromise of administrative sessions, enabling unauthorized actions within the Ghost platform. The vulnerability has a high severity with a CVSS 4.0 score of 8.6, indicating significant risk if exploited.
Mitigation Recommendations
A fix is available in Ghost version 6.64.0 and later. Users should upgrade to version 6.64.0 or newer to remediate this vulnerability. No additional mitigation steps are indicated in the provided data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-02T00:44:44.528Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abf99ada43b0b3b89b26748
Added to database: 10/02/2026, 11:46:53 UTC
Last enriched: 10/02/2026, 12:17:54 UTC
Last updated: 10/02/2026, 21:28:56 UTC
Views: 6
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