Signal is active with 1 mentions in latest observed window
Immediate actions
Patch affected systems immediately
Recommended action window: Monitor and triage in normal cycle
NVD description
Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2 allows Stored Cross-Site Scripting (XSS). The issue occurs because the attachment MIME type is not properly escaped on the attachment-validation warning page.
Directoratul Național de Securitate Cibernetică@DNSC_RO·
Patch
🚨 ALERTĂ - Vulnerabilități critice în Roundcube Webmail
⚠️ Roundcube a publicat actualizările de securitate 1.6.17 și 1.7.2, care remediază vulnerabilități identificate în aplicația Roundcube Webmail, CVE-2026-54432 și CVE-2026-54433.
👉 https://www.dnsc.ro/citeste/alerta-vulnerabilitati-critice-in-roundcube-webmail
#DNSC https://t.co/wMwMEsMee0
Post summary
Roundcube released updates 1.6.17 and 1.7.2 to patch CVE-2026-54432 and CVE-2026-54433; no exploit or PoC details are given.
Roundcube has released security updates 1.7.2 and 1.6.17 to address multiple vulnerabilities, including zero click stored cross site scripting, SSRF bypass issues, password plugin flaws, and denial of service risks.
The most concerning issue is CVE-2026-54433, a zero click stored XSS vulnerability in plain text rendering. That means a malicious email could potentially trigger script execution without the user needing to click a link or open an attachment.
The update also fixes CVE-2026-54432, a stored XSS issue involving attachment MIME type handling, along with DoS risks tied to crafted winmail.dat files.
For organizations using Roundcube Webmail, this is a clear patch now moment. Webmail is a common entry point for phishing, credential theft, and account takeover attempts, and zero click exposure raises the urgency.
Admins should upgrade to Roundcube 1.7.2 or 1.6.17 immediately, review exposed webmail instances, and monitor for suspicious email behavior or unusual account activity.
When email can become the trigger, patching cannot wait for someone to click.
#Roundcube#WebmailSecurity#CVE202654433#CVE202654432#ZeroClick#CrossSiteScripting#VulnerabilityManagement#PatchManagement#EmailSecurity#CyberRisk
Post summary
Roundcube releases updates 1.7.2/1.6.17 to fix CVE‑2026‑54433 and CVE‑2026‑54432, highlighting zero‑click stored XSS and DoS issues, urging organizations to patch promptly.
The article announces critical XSS and SSRF bypass vulnerabilities (CVE‑2026‑54433/54432) in Roundcube and recommends applying the 1.7.2 security patch to remediate the issue.
@The_Cyber_News The most dangerous attack surface is often the validation logic itself. By weaponizing the MIME type warning page, CVE-2026-54432 grants an attacker full, silent JS execution the moment the email is viewed. Traditional email gateway filters will completely miss this payload.
Post summary
The post discloses that CVE‑2026‑54432 enables silent JavaScript execution when an email is examined, exploiting a MIME type warning page, but lacks PoC, exploit code, patch, or evidence of ongoing attacks.
