CVE-2026-103277CWE-79cross-site-scripting

CVE-2026-103277

High · published October 1, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
18.7
In the wild
Unconfirmed
What it is

Ghost versions from 2.5.0 before 6.34.0 contain an untrusted script execution vulnerability in the oEmbed preview feature that fails to sandbox externally hosted scripts. Attackers can craft malicious oEmbed content to execute scripts in the context of a staff user's admin session, potentially compromising administrative access.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
8.6 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00273 · 18.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-01T15:17Z
References (2)
https://github.com/TryGhost/Ghost/security/advisories/GHSA-8vhf-xxpj-4qrg · [email protected]https://www.vulncheck.com/advisories/ghost-2.5.0-before-6.34.0-untrusted-script-execution-via-oembed · [email protected]
EPSS history
Timeline
  • 03 OCT 03:41Z
    EPSS moved — → 0%
    epss
  • 01 OCT 10:42Z
    Ghost 2.5.0 before 6.34.0 Untrusted Script Execution via oEmbed
    cvelistv5