CVE-2023-5631

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2023-10-26. Federal remediation due 2023-11-16.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

76.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.5% of scored records. A rank, not a probability.

NVD base score

5.4 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2023-10-18 14:51Z3 YR AGO

Last updated

2025-10-21 23:05Z1 YR AGO

Reserved

2023-10-18

Assigning CNA

ESET

Record state

PUBLISHED

Severity

Medium (CVSS 6.1)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

ea56b87f7d63d72f0c96c6c363aa1454c2a0d850f092b0fcf5e90e77aea2b8a5

• github.comhttps://github.com/roundcube/roundcubemail/commit/6ee6e7ae301e165e2b2cb703edf75552e5376613
• github.comhttps://github.com/roundcube/roundcubemail/releases/tag/1.6.4
• github.comhttps://github.com/roundcube/roundcubemail/releases/tag/1.5.5
• github.comhttps://github.com/roundcube/roundcubemail/releases/tag/1.4.15
• github.comhttps://github.com/roundcube/roundcubemail/issues/9168
• roundcube.nethttps://roundcube.net/news/2023/10/16/security-update-1.6.4-released
• github.comhttps://github.com/roundcube/roundcubemail/commit/41756cc3331b495cc0b71886984474dc529dd31d
• roundcube.nethttps://roundcube.net/news/2023/10/16/security-updates-1.5.5-and-1.4.15
• bugs.debian.orghttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1054079
• www.debian.orghttps://www.debian.org/security/2023/dsa-5531
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/10/msg00035.html
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/11/01/1
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/11/01/3
• lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LK67Q46OIEGJCRQUBHKLH3IIJTBNGGX4/
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/11/17/2
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-5631government-resource