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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.5.14)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.6.0,1.6.14)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Webmail", "source": "cna", "vendor": "Roundcube"}, "product": "webmail", "vendor": "roundcube"}], "analysis": {"en": {"generated_at": "2026-04-03T07:52:23.951769+00:00", "value": {"mitigation_remediation": ["Update Roundcube Webmail to at least version 1.5.14 or 1.6.14, or any later release that contains the fix.", "If an immediate update cannot be performed, configure the webmail system to block or disable remote image fetching, thereby restoring the intended protection.", "Sanitize or strip background attributes in incoming email BODY tags to prevent the bypass.", "Monitor mail logs for unusual remote image retrieval attempts and review for suspicious activity."], "summary": {"action": "Apply Patch", "impact": "Information Disclosure"}, "threat_synthesis": {"affected_systems": "Roundcube Webmail installations running a version older than 1.5.14 or 1.6.14 are affected. Any environment that has not applied these updates remains vulnerable.", "description_and_impact": "An attacker can craft an e\u2011mail with a BODY element that uses a background attribute pointing to a remote image. The Roundcube Webmail remote image blocking feature can be bypassed, allowing the client to fetch the external resource. This behavior may result in the disclosure of sensitive data or enable an access\u2011control bypass. The underlying weakness is an improper enforcement of access controls, classified as CWE\u2011669.", "risk_and_exploitability": "The vulnerability has a CVSS score of 5.3 and no EPSS score or KEV listing is available. By sending a specially crafted email containing a BODY element with a background attribute, an attacker can cause the webmail interface to retrieve a remote image. This can expose information or help bypass intended restrictions. The risk is moderate in contexts that accept unsolicited or malicious email content and in which the content is rendered before being displayed to the user."}}}}, "created": "2026-04-03T07:31:05.623340+00:00", "title": "Roundcube Webmail Remote Image Blocking Feature Bypass Allows Information Disclosure", "updated": "2026-04-03T09:15:52.211209+00:00", "vendors": ["roundcube", "roundcube$PRODUCT$webmail"]}