CVE-2026-21331

Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser. Scope is changed.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://helpx.adobe.com/security/products/connect/apsb26-37.html	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:adobe:connect:*:*:*:*:*:-:*:*

OR	cpe:2.3:o:apple:macos:-:::::::*
	cpe:2.3:o:microsoft:windows:-:::::::*

Configuration 2 (hide)

OR	cpe:2.3:a:adobe:connect_desktop_application::::::macos::*
	cpe:2.3:a:adobe:connect_desktop_application::::::windows::*

History

No history.

Information

Published : 2026-04-14 18:16

Updated : 2026-08-28 00:16

NVD link : CVE-2026-21331

Mitre link : CVE-2026-21331

CVE.ORG link : CVE-2026-21331

JSON object : View

Products Affected

apple

macos

microsoft

windows

adobe

connect_desktop_application
connect

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

{"id": "CVE-2026-21331", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-21331", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-14T18:33:02.818574Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "psirt@adobe.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.8}]}, "affected": [{"source": "psirt@adobe.com", "affectedData": [{"vendor": "Adobe", "product": "Adobe Connect", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "12.10"}, {"status": "unaffected", "version": "12.11", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Adobe", "product": "Adobe Connect Desktop Application", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "2025.3"}, {"status": "unaffected", "version": "2025.9", "versionType": "custom"}], "defaultStatus": "unaffected"}]}], "published": "2026-04-14T18:16:43.953", "references": [{"url": "https://helpx.adobe.com/security/products/connect/apsb26-37.html", "tags": ["Vendor Advisory"], "source": "psirt@adobe.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "psirt@adobe.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser. Scope is changed."}], "lastModified": "2026-08-28T00:16:57.030", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:adobe:connect:*:*:*:*:*:-:*:*", "vulnerable": true, "matchCriteriaId": "4A1D88E9-612C-49B1-8521-F2258D4D74CA", "versionEndExcluding": "12.11"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:macos:*:*", "vulnerable": true, "matchCriteriaId": "185BF6E9-82FC-45E0-A64E-03FB923F34AD", "versionEndIncluding": "2025.3"}, {"criteria": "cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:windows:*:*", "vulnerable": true, "matchCriteriaId": "783AAAA9-E68B-43E3-86A3-5227E27392A5", "versionEndExcluding": "2025.9.15"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@adobe.com"}