CVE-2026-15098
The Real3D Flipbook Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'lightboxtext' shortcode attribute (and other unsanitized attributes handled by on_shortcode()) in versions up to, and including, 5.1.1. This is due to insufficient input sanitization and output escaping in the on_shortcode() and print_global_options() functions: shortcode attribute values are copied verbatim into $this->flipbook_options and then emitted via wp_json_encode() inside a <script type="application/json"> block without the JSON_HEX_TAG flag, allowing a literal </script> byte sequence in the attribute value to break out of the JSON script context. Because WordPress's shortcode_parse_atts() applies stripcslashes() to attribute values, an attacker can encode the breakout tag as \x3c/script\x3e\x3cscript\x3e…\x3c/script\x3e, which survives the wp_kses_post save-time filter applied to Contributor content (the escape bytes are safe text characters, not HTML tags) and is decoded to real angle brackets at render time. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user (typically an Editor or Administrator previewing/moderating the pending post) accesses an injected page.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- Puntuación base: 6.4
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.19%
- Percentil entre todas las CVEs puntuadas: 8
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access75 % - Impacto principal
T1059.007JavaScriptexecution85 % - Impacto secundario
T1565.002Transmitted Data Manipulationimpact70 %
Plugin WordPress vulnerable a XSS almacenado (CWE-79) mediante atributos shortcode sin sanitizar. Requiere autenticación (PR:L) pero AV:N permite explotación remota. Impacto: ejecución de scripts en contexto de usuario (Editors/Admins) y modificación de contenido web.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-79
Referencias
- https://plugins.trac.wordpress.org/browser/real3d-flipbook-lite/tags/5.0/includes/Real3DFlipbook.php#L1224
- https://plugins.trac.wordpress.org/browser/real3d-flipbook-lite/tags/5.0/includes/Real3DFlipbook.php#L1468
- https://plugins.trac.wordpress.org/browser/real3d-flipbook-lite/tags/5.0/includes/Real3DFlipbook.php#L1668
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3643539%40real3d-flipbook-lite&new=3643539%40real3d-flipbook-lite
- https://www.wordfence.com/threat-intel/vulnerabilities/id/f6df3abe-ef27-46d7-bbdd-abd994fce132?source=cve
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-15098",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-15098",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-09-19T13:25:50.121711Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "security@wordfence.com",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 6.4,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "LOW"
},
"impactScore": 2.7,
"exploitabilityScore": 3.1
}
]
},
"affected": [
{
"source": "security@wordfence.com",
"affectedData": [
{
"vendor": "creativeinteractivemedia",
"product": "Real3D Flipbook – 3D FlipBook, PDF FlipBook, PDF Viewer, PDF Embedder",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "semver",
"lessThanOrEqual": "5.1.1"
}
],
"defaultStatus": "unaffected"
}
]
}
],
"published": "2026-09-19T08:16:52.487",
"references": [
{
"url": "https://plugins.trac.wordpress.org/browser/real3d-flipbook-lite/tags/5.0/includes/Real3DFlipbook.php#L1224",
"source": "security@wordfence.com"
},
{
"url": "https://plugins.trac.wordpress.org/browser/real3d-flipbook-lite/tags/5.0/includes/Real3DFlipbook.php#L1468",
"source": "security@wordfence.com"
},
{
"url": "https://plugins.trac.wordpress.org/browser/real3d-flipbook-lite/tags/5.0/includes/Real3DFlipbook.php#L1668",
"source": "security@wordfence.com"
},
{
"url": "https://plugins.trac.wordpress.org/changeset?reponame=&old=3643539%40real3d-flipbook-lite&new=3643539%40real3d-flipbook-lite",
"source": "security@wordfence.com"
},
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/f6df3abe-ef27-46d7-bbdd-abd994fce132?source=cve",
"source": "security@wordfence.com"
}
],
"vulnStatus": "Deferred",
"weaknesses": [
{
"type": "Secondary",
"source": "security@wordfence.com",
"description": [
{
"lang": "en",
"value": "CWE-79"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "The Real3D Flipbook Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'lightboxtext' shortcode attribute (and other unsanitized attributes handled by on_shortcode()) in versions up to, and including, 5.1.1. This is due to insufficient input sanitization and output escaping in the on_shortcode() and print_global_options() functions: shortcode attribute values are copied verbatim into $this->flipbook_options and then emitted via wp_json_encode() inside a <script type=\"application/json\"> block without the JSON_HEX_TAG flag, allowing a literal </script> byte sequence in the attribute value to break out of the JSON script context. Because WordPress's shortcode_parse_atts() applies stripcslashes() to attribute values, an attacker can encode the breakout tag as \\x3c/script\\x3e\\x3cscript\\x3e…\\x3c/script\\x3e, which survives the wp_kses_post save-time filter applied to Contributor content (the escape bytes are safe text characters, not HTML tags) and is decoded to real angle brackets at render time. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user (typically an Editor or Administrator previewing/moderating the pending post) accesses an injected page."
}
],
"lastModified": "2026-09-21T13:33:33.387",
"sourceIdentifier": "security@wordfence.com"
}