Stored XSS Vulnerability in Roundcube Webmail Software
CVE-2026-48849
4.4MEDIUM
Key Information:
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👾 Exploit Exists🟡 Public PoC
What is CVE-2026-48849?
In Roundcube Webmail versions 1.6.x prior to 1.6.16 and 1.7.x prior to 1.7.1, a vulnerability exists due to an unsanitized subject field within the draft restore functionality. This flaw can potentially allow attackers to inject malicious HTML or CSS code into shared mailboxes, leading to stored cross-site scripting (XSS) attacks. This could enable unauthorized scripts to be executed by users accessing the compromised mailbox, thereby compromising user data and security.
Affected Version(s)
Webmail 1.6.0 < 1.6.16
Webmail 1.7.0 < 1.7.1
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.