CVE-2026-103277 Ghost - Stored XSS

Ghost > 2.5.0 < 6.34.0 contains a stored XSS caused by unsandboxed externally hosted scripts in the oEmbed preview feature, letting attackers execute scripts in staff admin sessions, exploit requires crafted malicious oEmbed content.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.27% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Published
1 October 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to version 6.34.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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