Is CVE-2023-5631 actively exploited?

Yes. CVE-2023-5631 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2023-5631 be exploited remotely?

The attack vector of CVE-2023-5631 has not been classified yet.

What is the CVSS score of CVE-2023-5631?

CVE-2023-5631 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2023-5631

HIGHCISA KEVIN THE WILD

CVE-2023-5631

Published: October 26, 2023

EPSS:85.16%probability of exploitation in 30 daysPercentile:99.3th

Official Description

Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that allows a remote attacker to run malicious JavaScript code.

NVD Source

CISA KEV Advisory

Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability

Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that allows a remote attacker to run malicious JavaScript code.

Added to KEV: 2023-10-26Federal patch deadline: 2023-11-16

Required Action (CISA)

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Risk Analysis

This vulnerability in Roundcube Webmail allows a remote attacker to inject and run malicious JavaScript code within a user's webmail session. The high EPSS score of 0.85156 indicates a very high probability of exploitation, and its presence in the KEV catalog confirms it is actively being exploited. This poses a significant and urgent risk.

This vulnerability is actively being exploited in the wild and is included in CISA's KEV catalog. Attackers can exploit this remotely by sending specially crafted emails that trigger the XSS when viewed.

Recommended Action

Administrators should apply the latest security patches and updates for Roundcube Webmail immediately. Users should also exercise caution when opening emails from unknown or suspicious sources.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-5631 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2023-5631 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.