CVE-2026-24778

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In Ghost versions 5.43.0 through 5.12.04 and 6.0.0 through 6.14.0, an attacker was able to craft a malicious link that, when accessed by an authenticated staff user or member, would execute JavaScript with the victim's permissions, potentially leading to account takeover. Ghost Portal versions 2.29.1 through 2.51.4 and 2.52.0 through 2.57.0 were vulnerable to this issue. Ghost automatically loads the latest patch of the members Portal component via CDN. For Ghost 5.x users, upgrading to v5.121.0 or later fixes the vulnerability. v5.121.0 loads Portal v2.51.5, which contains the patch. For Ghost 6.x users, upgrading to v6.15.0 or later fixes the vulnerability. v6.15.0 loads Portal v2.57.1, which contains the patch. For Ghost installations using a customized or self-hosted version of Portal, it will be necessary to manually rebuild from or update to the latest patch version."}, {"lang": "es", "value": "Ghost es un sistema de gesti\u00f3n de contenido de c\u00f3digo abierto. En las versiones de Ghost 5.43.0 a 5.12.04 y 6.0.0 a 6.14.0, un atacante pudo crear un enlace malicioso que, cuando era accedido por un usuario de personal o miembro autenticado, ejecutar\u00eda JavaScript con los permisos de la v\u00edctima, lo que podr\u00eda llevar a la toma de control de la cuenta. Las versiones de Ghost Portal 2.29.1 a 2.51.4 y 2.52.0 a 2.57.0 eran vulnerables a este problema. Ghost carga autom\u00e1ticamente el \u00faltimo parche del componente Portal de miembros a trav\u00e9s de CDN. Para los usuarios de Ghost 5.x, actualizar a la v5.121.0 o posterior corrige la vulnerabilidad. La v5.121.0 carga Portal v2.51.5, que contiene el parche. Para los usuarios de Ghost 6.x, actualizar a la v6.15.0 o posterior corrige la vulnerabilidad. La v6.15.0 carga Portal v2.57.1, que contiene el parche. Para las instalaciones de Ghost que utilizan una versi\u00f3n personalizada o autoalojada de Portal, ser\u00e1 necesario reconstruir manualmente desde o actualizar a la \u00faltima versi\u00f3n del parche."}], "id": "CVE-2026-24778", "lastModified": "2026-06-17T10:23:34.713", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-24778", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-01-28T21:11:07.745052Z", "version": "2.0.3"}}]}, "published": "2026-01-27T22:15:57.097", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/TryGhost/Ghost/commit/da858e640e88e69c1773a7b7ecdc2008fa143849"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-gv6q-2m97-882h"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T01:54:38.788561+00:00", "value": {"mitigation_remediation": ["Upgrade the Ghost core to a patched release (v5.121.0+ for 5.x or v6.15.0+ for 6.x).", "For installations with a custom or self\u2011hosted portal, rebuild or update the portal to the latest patched version (v2.57.1 or newer).", "Apply a strong Content\u2011Security\u2011Policy on the portal to block injected scripts until a permanent fix is deployed."], "summary": {"action": "Patch immediately", "impact": "Remote code execution via cross\u2011site scripting"}, "threat_synthesis": {"affected_systems": "Ghost CMS versions 5.43.0 through 5.12.04 and 6.0.0 through 6.14.0, along with Ghost Portal component versions 2.29.1 through 2.51.4 and 2.52.0 through 2.57.0, are vulnerable. For Ghost 5.x users, upgrading to v5.121.0 or later (which includes Portal v2.51.5) resolves the issue; for Ghost 6.x users, upgrading to v6.15.0 or later (which includes Portal v2.57.1) is required. Installations that use a custom or self\u2011hosted portal must rebuild or update the portal to the latest patched version.", "description_and_impact": "A stored cross\u2011site scripting flaw allows an attacker to create a malicious portal preview link that runs arbitrary JavaScript with the permissions of any authenticated staff or member who opens it, potentially enabling account takeover. This is a classic reflected XSS weakness classified as CWE\u201179, and it requires the victim to interact with the crafted link while being logged in. The impact is the execution of code in the context of the authenticated user, preserving the attacker\u2019s privileges within the system.", "risk_and_exploitability": "The CVSS score of 8.8 indicates high severity, while the EPSS score of less than 1% reflects a low but not negligible likelihood of exploitation. The vulnerability is not listed in the CISA KEV catalog, so no confirmed public exploits are known. Attackers need an authenticated session and the victim must click the malicious link, but once executed the script runs with the victim's user rights, enabling further compromise of the account and potentially the broader platform."}}}}, "created": "2026-01-28T12:22:01.545038+00:00", "updated": "2026-04-18T02:00:10.467987+00:00", "vendors": ["ghost", "ghost$PRODUCT$ghost"]}