CVE-2026-20149

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{"affected": [{"affectedData": [{"product": "Cisco Webex Meetings", "vendor": "Cisco", "versions": [{"status": "affected", "version": "N/A"}]}], "source": "psirt@cisco.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:cisco:webex:-:*:*:*:*:*:*:*", "matchCriteriaId": "F1FBBF37-C988-48FC-934B-0F615DEED6EF", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in Cisco Webex could have allowed an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. Cisco has addressed this vulnerability, and no customer action is needed.\r\n\r This vulnerability was due to improper filtering of user-supplied input. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to follow a malicious link. A successful exploit could have allowed the attacker to conduct an XSS attack against the targeted user."}, {"lang": "es", "value": "Una vulnerabilidad en Cisco Webex podr\u00eda haber permitido a un atacante remoto no autenticado realizar un ataque de cross-site scripting (XSS). Cisco ha abordado esta vulnerabilidad y no se requiere ninguna acci\u00f3n por parte del cliente.\nEsta vulnerabilidad se deb\u00eda a un filtrado inadecuado de la entrada proporcionada por el usuario. Antes de que esta vulnerabilidad fuera abordada, un atacante podr\u00eda haber explotado esta vulnerabilidad persuadiendo a un usuario para que siguiera un enlace malicioso. Un exploit exitoso podr\u00eda haber permitido al atacante realizar un ataque XSS contra el usuario objetivo."}], "id": "CVE-2026-20149", "lastModified": "2026-06-17T10:17:13.120", "metrics": {"cvssMetricV31": [{"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": "psirt@cisco.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20149", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-04T20:52:17.689659Z", "version": "2.0.3"}}]}, "published": "2026-03-04T18:16:27.427", "references": [{"source": "psirt@cisco.com", "tags": ["Vendor Advisory"], "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-xss-TZFTbbwN"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "psirt@cisco.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 87.0, "confidence_source": "matching", "scores": [{"score": 87.0, "source": "matching"}]}, "original": {"product": "Cisco Webex Meetings", "source": "cna", "vendor": "Cisco"}, "product": "webex_meetings", "vendor": "cisco"}], "analysis": {"en": {"generated_at": "2026-04-17T13:06:22.763425+00:00", "value": {"mitigation_remediation": ["Apply the latest Cisco Webex Meetings release that contains the XSS fix, or ensure the update is scheduled for deployment as soon as possible.", "If a custom or third\u2011party component is used to render Webex content, verify that all user\u2011supplied data is correctly escaped or sanitized before rendering in the browser.", "Deploy a strict content\u2011security\u2011policy in browsers or reverse proxies to disallow inline script execution, thereby reducing the impact of any remaining injection flaws."], "summary": {"action": "No action required", "impact": "Cross\u2011site scripting that allows an attacker to run malicious code in a victim\u2019s browser"}, "threat_synthesis": {"affected_systems": "The vulnerability applies to Cisco Webex Meetings. No specific version range is provided, so any deployment of Webex Meetings could be affected until the vendor\u2019s fix is applied.", "description_and_impact": "A flaw in Cisco Webex\u2019s input filtering permits an attacker to embed malicious JavaScript in a link. When a user opens the link, the script executes within the victim\u2019s browser context, potentially stealing session data, defacing the interface, or compromising the client\u2019s security. This vulnerability is a clear example of improper input validation, as indicated by its association with CWE\u201179.", "risk_and_exploitability": "The CVSS score of 6.1 indicates moderate severity, while the EPSS score of less than 1% shows a very low likelihood of real\u2011world exploitation. The vulnerability is not listed in CISA\u2019s KEV catalog. An unauthenticated attacker would need to persuade a user to click a malicious link; the attack vector is therefore social engineering rather than network intrusion."}}}}, "created": "2026-03-05T09:06:24.748455+00:00", "title": "Remote Cross\u2011Site Scripting via Improper Input Filtering in Cisco Webex Meetings", "updated": "2026-04-17T13:15:19.661723+00:00", "vendors": ["cisco", "cisco$PRODUCT$webex_meetings"]}