POJIA破甲
地图 / Roundcube Webmail Style Sanitizer can be bypassed using CSS Character Escapes

Roundcube Webmail Style Sanitizer can be bypassed using CSS Character Escapes

信息泄露 / 信息泄露 / #3443563

厂商
Nextcloud
严重程度
低危 · CVSS 4.3
赏金
—
弱点
信息泄露
研究员
@somerandomdev
披露日期
2026-01-14
资产
https://github.com/roundcube/roundcubemail
CVE
—

该报告还没有中文解读。

原文摘录

摘自原文(1041 字符中的一小部分)
Summary: The style sanitizer in Roundcube Webmail can be bypassed by creating HTML entities using CSS character escapes. This allows using arbitrary inline CSS, like e.g. `url()`, and retrieve the IP address and user agent of the person reading the email.
原文中的代码
<div style='content: "\0026quot;; background: url(//http.cat/418); content:""; width: 100%; height: 100%;'>hi, this shouldn't work :(</div>

默认不展示报告全文。以上为简短摘录,完整复现过程请阅读原文。版权归研究员与 Nextcloud 所有。

时间线

  • 报告提交
  • 公开披露
阅读 HackerOne 原文 ↗作者 @somerandomdev · 版权归作者与 Nextcloud 所有

同类报告

Confidential data of users and limited metadata of programs and reports accessible via GraphQLHackerOne · 2019-02-03Sensitive user information disclosure at bonjour.uber.com/marketplace/_rpc via the 'userUuid' parameterUber · 2019-09-09The /reports/:id.json endpoint discloses potentially sensitive user attributes when reporter summary is presentHackerOne · 2025-04-01Customer private program can disclose email any users through invited via usernameHackerOne · 2020-05-15 · $7,500Access to multiple production Grafana dashboardsSnapchat · 2020-11-04 · $10,000Open prod Jenkins instanceSnapchat · 2017-08-19 · $15,000