An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. The vulnerability occurs due to inadequate input validation of the res parameter, allowing an authenticated attacker to inject and execute arbitrary JavaScript code within the context of another user's browser session. By uploading a malicious JavaScript file, accessible externally, and crafting a URL containing its location in the res parameter, the attacker can exploit this vulnerability. Subsequently, when another user visits the crafted URL, the malicious JavaScript code is executed.
Conclusion & alert: CVE-2024-33536 is rated Low Risk (35.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.18%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
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 | 2026-01-01 | 0.13% | 0.18% | +0.05% |
| 2 | 2025-11-21 | 0.17% | 0.13% | -0.04% |
| 3 | 2025-11-18 | — | 0.17% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.4 | 3.1 | MEDIUM |
|
2.3 | 2.7 | [email protected] |
| 5.4 | 3.1 | MEDIUM |
|
2.3 | 2.7 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| zimbra | collaboration | >= 10.0.0, < 10.0.8 | cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:-:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p0:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p1:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p10:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p11:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p12:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p13:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p14:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p15:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p16:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p19:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p2:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p20:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p21:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p23:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p24:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p24.1:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p25:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p26:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p27:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p3:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p30:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p31:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p32:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p33:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p34:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p35:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p36:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p37:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p38:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p39:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p4:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p5:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p6:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p7:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p7.1:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p8:*:*:*:*:*:* |
| zimbra | collaboration | 9.0.0 | cpe:2.3:a:zimbra:collaboration:9.0.0:p9:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.8#Security_Fixes | Release Notes |
| https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P40#Security_Fixes | Release Notes |