Description
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via a crafted background attribute of a BODY element in an e-mail message. This may lead to information disclosure or access-control bypass.
Affected products
roundcube: webmail
References7
- roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1… Vendor Advisory
- github.com/roundcube/roundcubemail/commit/e052328e3dc75f13adc2e… Patch
- github.com/roundcube/roundcubemail/commit/fd0e98178db5c73eaa93d… Patch
- github.com/roundcube/roundcubemail/commit/fde14d01adc9f37893cd8… Patch
- github.com/roundcube/roundcubemail/releases/tag/1.5.14 Release Notes
- github.com/roundcube/roundcubemail/releases/tag/1.6.14 Release Notes
- github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 Release Notes
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - EPSS — exploit probability
- 0% percentile: 37 · as of 12 November 2026
- CWE
- CWE-669
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.