How severe is CVE-2009-4363?

CVE-2009-4363 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-4363 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4363?

CVE-2009-4363 primarily affects Horde Application Framework. In total, 61 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-4363?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-4363 published?

CVE-2009-4363 was published on 2009-12-21 and last updated on 2026-06-16.

CVE-2009-4363

CVE-2009-4363 is a medium-severity vulnerability in Horde Application Framework with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Horde Application Framework
Published: 2009-12-21
Last modified: 2026-06-16

Description

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."

Frequently asked questions

What is CVE-2009-4363?: 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."
How severe is CVE-2009-4363?: CVE-2009-4363 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-4363 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4363?: CVE-2009-4363 primarily affects Horde Application Framework. In total, 61 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-4363?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-4363 published?: CVE-2009-4363 was published on 2009-12-21 and last updated on 2026-06-16.

References

Affected products (61)

cpe:2.3:a:horde:application_framework:*:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:2.0:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:2.1:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:2.1.3:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:2.2:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:2.2.3:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:2.2.4:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:2.2.4_rc1:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:2.2.5:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:2.2.6:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.0:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.0.1:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.0.2:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.0.3:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.0.4:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.0.6:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.0.7:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.0.8:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.0.9:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.1:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.1.1:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.2:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.2.1:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.2.2:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.2.3:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.2.4:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.3:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.3.1:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.3.2:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.3.3:*:*:*:*:*:*:*
cpe:2.3:a:horde:application_framework:3.3.4:*:*:*:*:*:*:*
cpe:2.3:a:horde:groupware:*:*:*:*:*:*:*:*
cpe:2.3:a:horde:groupware:1.0:*:*:*:*:*:*:*
cpe:2.3:a:horde:groupware:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:horde:groupware:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:horde:groupware:1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:horde:groupware:1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:horde:groupware:1.0.5:*:*:*:*:*:*:*
cpe:2.3:a:horde:groupware:1.1:*:*:*:*:*:*:*

More vulnerabilities in Horde Application Framework

CVE-2006-1491 — High (CVSS 7.5): Eval injection vulnerability in Horde Application Framework versions 3.0 before 3.0.10 and 3.1 before 3.1.1 allows…
CVE-2009-3701 — Medium (CVSS 4.3): Multiple cross-site scripting (XSS) vulnerabilities in the administration interface in Horde Application Framework…
CVE-2009-3236 — Medium (CVSS 4.3): The form library in Horde Application Framework 3.2 before 3.2.5 and 3.3 before 3.3.5; Groupware 1.1 before 1.1.6 and…
CVE-2008-5917 — Medium (CVSS 4.3): Cross-site scripting (XSS) vulnerability in the XSS filter (framework/Text_Filter/Filter/xss.php) in Horde Application…
CVE-2006-4256 — Medium (CVSS 4.3): index.php in Horde Application Framework before 3.1.2 allows remote attackers to include web pages from other sites,…
CVE-2005-0961 — Medium (CVSS 4.3): Cross-site scripting (XSS) vulnerability in Horde 3.0.4 before 3.0.4-RC2 allows remote attackers to inject arbitrary…

All CVEs affecting Horde Application Framework →

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

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →