CVE-2021-21608

jenkins: Stored XSS vulnerability in button labels

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not escape button labels in the Jenkins UI, resulting in a cross-site scripting (XSS) vulnerability exploitable by attackers with the ability to control button labels.

Jenkins versiones 2.274 y anteriores, LTS versiones 2.263.1 y anteriores, no escapan las etiquetas de los botones en la Interfaz de Usuario de Jenkins, resultando en una vulnerabilidad de tipo cross-site scripting (XSS) explotable por unos atacantes con la habilidad de controlar unas etiquetas de unos botones.

A flaw was found in jenkins. A cross-site scripting (XSS) vulnerability, due to the button labels not being properly escaped, can allow an attacker to control button labels. The highest threat from this vulnerability is to data confidentiality and integrity.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-04 CVE Reserved
2021-01-13 CVE Published
2023-03-08 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

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

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2035	2023-11-02
https://access.redhat.com/security/cve/CVE-2021-21608	2021-03-03
https://bugzilla.redhat.com/show_bug.cgi?id=1925140	2021-03-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Jenkins Search vendor "Jenkins"		Jenkins Search vendor "Jenkins" for product "Jenkins"				<= 2.263.1 Search vendor "Jenkins" for product "Jenkins" and version " <= 2.263.1"		lts		Affected
Jenkins Search vendor "Jenkins"		Jenkins Search vendor "Jenkins" for product "Jenkins"				<= 2.274 Search vendor "Jenkins" for product "Jenkins" and version " <= 2.274"		-		Affected