IMP Horde Groupware/Horde Groupware Webmail Edition up to 5.2.15 data:text/html action/xlink HTML injection

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in IMP Horde Groupware and Horde Groupware Webmail Edition up to 5.2.15. It has been classified as problematic. The affected element is an unknown function of the component data:text/html Handler. Performing a manipulation of the argument action/xlink results in HTML injection. This vulnerability is reported as CVE-2016-5303. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in IMP Horde Groupware and Horde Groupware Webmail Edition up to 5.2.15 (Groupware Software). This affects an unknown code block of the component data:text/html Handler. The manipulation of the argument action/xlink with an unknown input leads to a html injection vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

Cross-site scripting (XSS) vulnerability in the Horde Text Filter API in Horde Groupware and Horde Groupware Webmail Edition before 5.2.16 allows remote attackers to inject arbitrary web script or HTML via crafted data:text/html content in a form (1) action or (2) xlink attribute.

The bug was discovered 10/03/2017. The weakness was disclosed 12/20/2016 (Website). The advisory is shared at marc.info. This vulnerability is uniquely identified as CVE-2016-5303 since 06/06/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 255096 (Linux Distros Unpatched Vulnerability : CVE-2016-5303), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.2.16 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (255096) and SecurityFocus (BID 94997†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: HTML injection
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 255096
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2016-5303

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Horde Groupware/Horde Groupware Webmail Edition 5.2.16
Patch: github.com

Timelineinfo

06/06/2016 🔍
12/20/2016 +197 days 🔍
12/20/2016 +0 days 🔍
12/21/2016 +1 days 🔍
12/21/2016 +0 days 🔍
10/03/2017 +286 days 🔍
08/27/2025 +2885 days 🔍

Sourcesinfo

Advisory: 30d5506c20d26efbb9942fbdc6f981a0bd333b97
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-5303 (🔍)
GCVE (CVE): GCVE-0-2016-5303
GCVE (VulDB): GCVE-100-94617
SecurityFocus: 94997 - Horde Groupware Multiple Cross Site Scripting Vulnerabilities

Entryinfo

Created: 12/21/2016 09:48
Updated: 08/27/2025 09:30
Changes: 12/21/2016 09:48 (60), 07/12/2019 18:23 (5), 10/12/2022 13:11 (5), 08/27/2025 09:30 (19)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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