Text_Filter/lib/Horde/Text/Filter/Xss.php in Horde Application Framework before 3.3.6, Horde Groupware before 1.2.5, and Horde Groupware Webmail Edition before 1.2.5 does not properly handle data: URIs, which allows remote attackers to conduct cross-site scripting (XSS) attacks via data:text/html values for the HREF attribute of an A element in an HTML e-mail message. NOTE: the vendor states that the issue is caused by "an XSS vulnerability in Firefox browsers."
Conclusion & alert: CVE-2009-4363 is rated Exploit Available (57/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.37%). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 2026-06-15 | 0.48% | 1.37% | +0.89% |
| 2 | 2025-03-30 | 0.64% | 0.48% | -0.17% |
| 3 | 2025-03-29 | — | 0.64% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2009-4363 |
ubuntu
|
low | CVE-2009-4363 low priority: Ubuntu including 1 source packages (horde3), 10 status rows across 10 suites (dapper, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): ignored 4, not-affected 4, released 2. | https://ubuntu.com/security/CVE-2009-4363 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| horde | application_framework | <= 3.3.5 | cpe:2.3:a:horde:application_framework:*:*:*:*:*:*:*:* |
| horde | application_framework | 2.0 | cpe:2.3:a:horde:application_framework:2.0:*:*:*:*:*:*:* |
| horde | application_framework | 2.1 | cpe:2.3:a:horde:application_framework:2.1:*:*:*:*:*:*:* |
| horde | application_framework | 2.1.3 | cpe:2.3:a:horde:application_framework:2.1.3:*:*:*:*:*:*:* |
| horde | application_framework | 2.2 | cpe:2.3:a:horde:application_framework:2.2:*:*:*:*:*:*:* |
| horde | application_framework | 2.2.1 | cpe:2.3:a:horde:application_framework:2.2.1:*:*:*:*:*:*:* |
| horde | application_framework | 2.2.3 | cpe:2.3:a:horde:application_framework:2.2.3:*:*:*:*:*:*:* |
| horde | application_framework | 2.2.4 | cpe:2.3:a:horde:application_framework:2.2.4:*:*:*:*:*:*:* |
| horde | application_framework | 2.2.4_rc1 | cpe:2.3:a:horde:application_framework:2.2.4_rc1:*:*:*:*:*:*:* |
| horde | application_framework | 2.2.5 | cpe:2.3:a:horde:application_framework:2.2.5:*:*:*:*:*:*:* |
| horde | application_framework | 2.2.6 | cpe:2.3:a:horde:application_framework:2.2.6:*:*:*:*:*:*:* |
| horde | application_framework | 3.0 | cpe:2.3:a:horde:application_framework:3.0:*:*:*:*:*:*:* |
| horde | application_framework | 3.0.1 | cpe:2.3:a:horde:application_framework:3.0.1:*:*:*:*:*:*:* |
| horde | application_framework | 3.0.2 | cpe:2.3:a:horde:application_framework:3.0.2:*:*:*:*:*:*:* |
| horde | application_framework | 3.0.3 | cpe:2.3:a:horde:application_framework:3.0.3:*:*:*:*:*:*:* |
| horde | application_framework | 3.0.4 | cpe:2.3:a:horde:application_framework:3.0.4:*:*:*:*:*:*:* |
| horde | application_framework | 3.0.6 | cpe:2.3:a:horde:application_framework:3.0.6:*:*:*:*:*:*:* |
| horde | application_framework | 3.0.7 | cpe:2.3:a:horde:application_framework:3.0.7:*:*:*:*:*:*:* |
| horde | application_framework | 3.0.8 | cpe:2.3:a:horde:application_framework:3.0.8:*:*:*:*:*:*:* |
| horde | application_framework | 3.0.9 | cpe:2.3:a:horde:application_framework:3.0.9:*:*:*:*:*:*:* |
| horde | application_framework | 3.1 | cpe:2.3:a:horde:application_framework:3.1:*:*:*:*:*:*:* |
| horde | application_framework | 3.1.1 | cpe:2.3:a:horde:application_framework:3.1.1:*:*:*:*:*:*:* |
| horde | application_framework | 3.2 | cpe:2.3:a:horde:application_framework:3.2:*:*:*:*:*:*:* |
| horde | application_framework | 3.2.1 | cpe:2.3:a:horde:application_framework:3.2.1:*:*:*:*:*:*:* |
| horde | application_framework | 3.2.2 | cpe:2.3:a:horde:application_framework:3.2.2:*:*:*:*:*:*:* |
| horde | application_framework | 3.2.3 | cpe:2.3:a:horde:application_framework:3.2.3:*:*:*:*:*:*:* |
| horde | application_framework | 3.2.4 | cpe:2.3:a:horde:application_framework:3.2.4:*:*:*:*:*:*:* |
| horde | application_framework | 3.3 | cpe:2.3:a:horde:application_framework:3.3:*:*:*:*:*:*:* |
| horde | application_framework | 3.3.1 | cpe:2.3:a:horde:application_framework:3.3.1:*:*:*:*:*:*:* |
| horde | application_framework | 3.3.2 | cpe:2.3:a:horde:application_framework:3.3.2:*:*:*:*:*:*:* |
| horde | application_framework | 3.3.3 | cpe:2.3:a:horde:application_framework:3.3.3:*:*:*:*:*:*:* |
| horde | application_framework | 3.3.4 | cpe:2.3:a:horde:application_framework:3.3.4:*:*:*:*:*:*:* |
| horde | groupware | <= 1.2.4 | cpe:2.3:a:horde:groupware:*:*:*:*:*:*:*:* |
| horde | groupware | 1.0 | cpe:2.3:a:horde:groupware:1.0:*:*:*:*:*:*:* |
| horde | groupware | 1.0.1 | cpe:2.3:a:horde:groupware:1.0.1:*:*:*:*:*:*:* |
| horde | groupware | 1.0.2 | cpe:2.3:a:horde:groupware:1.0.2:*:*:*:*:*:*:* |
| horde | groupware | 1.0.3 | cpe:2.3:a:horde:groupware:1.0.3:*:*:*:*:*:*:* |
| horde | groupware | 1.0.4 | cpe:2.3:a:horde:groupware:1.0.4:*:*:*:*:*:*:* |
| horde | groupware | 1.0.5 | cpe:2.3:a:horde:groupware:1.0.5:*:*:*:*:*:*:* |
| horde | groupware | 1.1 | cpe:2.3:a:horde:groupware:1.1:*:*:*:*:*:*:* |
| horde | groupware | 1.1.1 | cpe:2.3:a:horde:groupware:1.1.1:*:*:*:*:*:*:* |
| horde | groupware | 1.1.2 | cpe:2.3:a:horde:groupware:1.1.2:*:*:*:*:*:*:* |
| horde | groupware | 1.1.3 | cpe:2.3:a:horde:groupware:1.1.3:*:*:*:*:*:*:* |
| horde | groupware | 1.1.4 | cpe:2.3:a:horde:groupware:1.1.4:*:*:*:*:*:*:* |
| horde | groupware | 1.1.5 | cpe:2.3:a:horde:groupware:1.1.5:*:*:*:*:*:*:* |
| horde | groupware | 1.2 | cpe:2.3:a:horde:groupware:1.2:*:*:*:*:*:*:* |
| horde | groupware | 1.2 | cpe:2.3:a:horde:groupware:1.2:rc1:*:*:*:*:*:* |
| horde | groupware | 1.2.1 | cpe:2.3:a:horde:groupware:1.2.1:*:*:*:*:*:*:* |
| horde | groupware | 1.2.2 | cpe:2.3:a:horde:groupware:1.2.2:*:*:*:*:*:*:* |
| horde | groupware | 1.2.3 | cpe:2.3:a:horde:groupware:1.2.3:*:*:*:*:*:*:* |
| horde | groupware | 1.0 | cpe:2.3:a:horde:groupware:1.0:rc1:*:*:*:*:*:* |
| horde | groupware | 1.0 | cpe:2.3:a:horde:groupware:1.0:rc2:*:*:*:*:*:* |
| horde | groupware | 1.0.6 | cpe:2.3:a:horde:groupware:1.0.6:*:*:*:*:*:*:* |
| horde | groupware | 1.0.7 | cpe:2.3:a:horde:groupware:1.0.7:*:*:*:*:*:*:* |
| horde | groupware | 1.0.8 | cpe:2.3:a:horde:groupware:1.0.8:*:*:*:*:*:*:* |
| horde | groupware | 1.1 | cpe:2.3:a:horde:groupware:1.1:rc1:*:*:*:*:*:* |
| horde | groupware | 1.1 | cpe:2.3:a:horde:groupware:1.1:rc2:*:*:*:*:*:* |
| horde | groupware | 1.1 | cpe:2.3:a:horde:groupware:1.1:rc3:*:*:*:*:*:* |
| horde | groupware | 1.1 | cpe:2.3:a:horde:groupware:1.1:rc4:*:*:*:*:*:* |
| horde | groupware | 1.1.6 | cpe:2.3:a:horde:groupware:1.1.6:*:*:*:*:*:*:* |
| horde | groupware | 1.2.3 | cpe:2.3:a:horde:groupware:1.2.3:rc1:*:*:*:*:*:* |