An issue was discovered in Zimbra Collaboration (ZCS) through 10.1. A Cross-Site Scripting (XSS) vulnerability exists in Zimbra webmail due to insufficient validation of the content type metadata when importing files into the briefcase. Attackers can exploit this issue by crafting a file with manipulated metadata, allowing them to bypass content type checks and execute arbitrary JavaScript within the victim's session.
Conclusion & alert: CVE-2024-45515 is rated Moderate Risk (40.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.24%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-26 | 0.09% | 0.24% | +0.15% |
| 2 | 2025-11-21 | 0.04% | 0.09% | +0.05% |
| 3 | 2025-11-18 | — | 0.04% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.1 | 3.1 | MEDIUM |
|
2.8 | 2.7 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| zimbra | collaboration | <= 10.1.0 | cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://wiki.zimbra.com/wiki/Security_Center | Release Notes |
| https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.9#Security_Fixes | Release Notes |
| https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy | Product |
| https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories | Vendor Advisory |