// For flags

CVE-2021-21603

jenkins: XSS vulnerability in notification bar

Severity Score

5.4
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not escape notification bar response contents, resulting in a cross-site scripting (XSS) vulnerability.

Jenkins versiones 2.274 y anteriores, LTS versiones 2.263.1 y anteriores, no escapan el contenido de respuesta de la barra de notificaciones, resultando en una vulnerabilidad de tipo cross-site scripting (XSS).

A flaw was found in jenkins. A cross-site scripting (XSS) vulnerability is possible due to the contents of the notification bar responses not being properly escaped. The highest threat from this vulnerability is to data confidentiality and integrity.

Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.6.17. Issues addressed include cross site scripting, denial of service, deserialization, and traversal vulnerabilities.

*Credits: N/A
CVSS Scores
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
  • 2024-08-03 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC
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