CVE-2026-48849
Roundcube Webmail Stored XSS/HTML/CSS Injection
Description
In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, an unsanitized subject field in the draft restored value could lead to stored XSS/HTML/CSS injection on shared mailboxes.
INFO
Published Date :
May 25, 2026, 8:16 p.m.
Last Modified :
May 26, 2026, 7:26 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Roundcube Webmail to version 1.6.16 or later.
- Update Roundcube Webmail to version 1.7.1 or later.
Public PoC/Exploit Available at Github
CVE-2026-48849 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-48849.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-48849 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-48849
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
This repository documents CVE-2026-48849, a Stored Cross-Site Scripting (XSS), HTML Injection, and CSS Injection vulnerability discovered in Roundcube Webmai
roundcube roundcube-webmail roundcubemail xss xss-vulnerability cve-2026-48849 storedxss
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-48849 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-48849 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
May. 25, 2026
Action Type Old Value New Value Added Description In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, an unsanitized subject field in the draft restored value could lead to stored XSS/HTML/CSS injection on shared mailboxes. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N Added CWE CWE-79 Added Reference https://github.com/roundcube/roundcubemail/commit/189d30a4890319cd687df959ca9f768a3a613d61 Added Reference https://github.com/roundcube/roundcubemail/commit/a21519187873ce962db029b6ff68e47bd7f3fd8a Added Reference https://github.com/roundcube/roundcubemail/releases/tag/1.6.16 Added Reference https://github.com/roundcube/roundcubemail/releases/tag/1.7.1 Added Reference https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1