What is the CVSS score of CVE-2023-37580?

CVE-2023-37580 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 59.0%.

Is there a public PoC exploit available for CVE-2023-37580?

Yes, a public proof-of-concept exploit is available for CVE-2023-37580. Prioritise patching immediately. EPSS: 59.0%.

Is there a patch available for CVE-2023-37580?

Yes, a patch is available for CVE-2023-37580. Update the affected software to the latest version immediately.

Zimbra Collaboration Suite CVE-2023-37580

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2023-07-31 cve@mitre.org

XSS Zimbra Collaboration Suite Synacor

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Added to CISA KEV

Jul 14, 2026 - 04:22 CISA

CVE Published

Jul 31, 2023 - 16:15 nvd

MEDIUM 6.1

DescriptionNVD

Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.

AnalysisAI

Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client. Affected products include: Synacor Zimbra Collaboration Suite. Version information: before 8.8.15.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.