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Known exploited vulnerability

CVE-2023-5631

mediumCVSS 3.1 5.4In CISA KEVEPSS 76%Published · Roundcube

The short answer

CVE-2023-5631 affects Roundcube Roundcubemail and is rated medium (CVSS 5.4). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-10-26: attackers are using it, so patch it first. The vendor has linked a patch.

What it is

Roundcube before 1.4.15, 1.5.x before 1.5.5, and 1.6.x before 1.6.4 allows stored XSS via an HTML e-mail message with a crafted SVG document because of program/lib/Roundcube/rcube_washtml.php behavior. This could allow a remote attacker to load arbitrary JavaScript code.

Weakness: CWE-79.

Severity

5.4 medium

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

Exploited (CISA KEV)

Yes, since Oct 26, 2023

Federal due date Nov 16, 2023

EPSS, next 30 days

76%

Higher than 100% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

What CISA says to do

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

Affected products

Roundcubemail. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2023-5631 being exploited?

Yes. CISA added CVE-2023-5631 to its Known Exploited Vulnerabilities catalog on 2023-10-26, with a federal remediation due date of 2023-11-16.

How do I fix CVE-2023-5631?

CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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