CVE-2025-20240
Status: DeferredMedium (6.1)—
A vulnerability in the Web Authentication feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to conduct a reflected cross-site scripting attack (XSS) on an affected device.
This vulnerability is due to improper sanitization of user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a malicious link. A successful exploit could allow the attacker to execute a reflected XSS attack and steal user cookies from the affected device.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Base score: 6.1
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.29%
- Percentile among all scored CVEs: 20
- Score date: 10/5/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
CWEs
- CWE-692
References
Raw JSON (NVD)
Show
{
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],
"published": "2025-09-24T18:15:34.333",
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webui-xss-VWyDgjOU",
"source": "psirt@cisco.com"
}
],
"vulnStatus": "Deferred",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-692"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the Web Authentication feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to conduct a reflected cross-site scripting attack (XSS) on an affected device.\r\n\r This vulnerability is due to improper sanitization of user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a malicious link. A successful exploit could allow the attacker to execute a reflected XSS attack and steal user cookies from the affected device."
},
{
"lang": "es",
"value": "Una vulnerabilidad en la característica de autenticación web de Cisco IOS XE Software podría permitir a un atacante remoto no autenticado llevar a cabo un ataque de cross-site scripting (XSS) reflejado en un dispositivo afectado. Esta vulnerabilidad se debe a una sanitización inadecuada de la entrada proporcionada por el usuario. Un atacante podría explotar esta vulnerabilidad persuadiendo a un usuario para que haga clic en un enlace malicioso. Un exploit exitoso podría permitir al atacante ejecutar un ataque de XSS reflejado y robar las cookies del usuario del dispositivo afectado."
}
],
"lastModified": "2026-09-26T00:10:00.127",
"sourceIdentifier": "psirt@cisco.com"
}