CVE-2021-26929

Horde Groupware Webmail 5.2.22 - Stored XSS

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An XSS issue was discovered in Horde Groupware Webmail Edition through 5.2.22 (where the Horde_Text_Filter library before 2.3.7 is used). The attacker can send a plain text e-mail message, with JavaScript encoded as a link or email that is mishandled by preProcess in Text2html.php, because bespoke use of \x00\x00\x00 and \x01\x01\x01 interferes with XSS defenses.

Se detectó un problema de tipo XSS en Horde Groupware Webmail Edition versiones hasta 5.2.22 (donde es usada la biblioteca Horde_Text_Filter versiones anteriores a 2.3.7). El atacante puede enviar un mensaje de correo electrónico de texto plano, con JavaScript codificado como un enlace o correo electrónico que es manejado apropiadamente por la función preProcess en el archivo Text2html.php, porque el uso personalizado de \x00\x00\x00 y \x01\x01\x01 interfiere con las defensas de XSS

Webmail Edition version 5.2.22 suffers from remote code execution and cross site scripting vulnerabilities via the Horde_Text_Filter library.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-02-09 CVE Reserved
2021-02-14 CVE Published
2021-04-15 First Exploit
2024-08-03 CVE Updated
2024-11-01 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (8)

URL	Tag	Source
http://packetstormsecurity.com/files/162194/Horde-Groupware-Webmail-5.2.22-Cross-Site-Scripting.html	Third Party Advisory
https://github.com/horde/webmail/releases	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00028.html	Mailing List

URL	Date	SRC
https://www.exploit-db.com/exploits/49769	2021-04-15
http://packetstormsecurity.com/files/162187/Webmail-Edition-5.2.22-XSS-Remote-Code-Execution.html	2024-08-03
https://www.alexbirnberg.com/horde-xss.html	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://lists.horde.org/archives/announce/2021/001298.html	2021-04-19
https://www.horde.org/apps/webmail	2021-04-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Horde Search vendor "Horde"		Groupware Search vendor "Horde" for product "Groupware"				<= 5.2.22 Search vendor "Horde" for product "Groupware" and version " <= 5.2.22"		webmail		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected