9.3

CVE-2026-21580

This Critical severity Stored XSS, PrivEsc (Privilege Escalation), and Security Misconfiguration vulnerability was introduced in versions 7.1.1, 7.4.0, 7.13.0, 7.17.0, 7.19.0, 8.0.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0 and 10.2.0 of Confluence Data Center and Server.

This Stored XSS, PrivEsc (Privilege Escalation), and Security Misconfiguration vulnerability, with a CVSS Score of 8.6, allows an unauthenticated attacker to execute arbitrary HTML or JavaScript code on a victims browser, perform actions as a higher-privileged user, and to get into the system utilizing loopholes exposed from security best-practices being overlooked.

Atlassian recommends that Confluence Data Center and Server customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:
 Confluence Data Center and Server 9.2: Upgrade to a release greater than or equal to 9.2.21

 Confluence Data Center and Server 10.2: Upgrade to a release greater than or equal to 10.2.13

See the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center and Server from the download center ([https://www.atlassian.com/software/confluence/download-archives]).

This vulnerability was reported via our Bug Bounty program.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerAtlassian
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Produkt Confluence Data Center
Version 10.2.0 to 10.2.11
Status affected
Version 10.1.0 to 10.1.2
Status affected
Version 10.0.2 to 10.0.3
Status affected
Version 9.5.1 to 9.5.4
Status affected
Version 9.4.0 to 9.4.1
Status affected
Version 9.3.1 to 9.3.2
Status affected
Version 9.2.0 to 9.2.20
Status affected
Version 9.1.0 to 9.1.1
Status affected
Version 9.0.3
Status affected
Version 8.9.6 to 8.9.8
Status affected
Version 8.5.15 to 8.5.31
Status affected
Version 7.19.27 to 7.19.30
Status affected
Version 10.2.13 to 10.2.15
Status unaffected
Version 9.2.21 to 9.2.23
Status unaffected
HerstellerAtlassian
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Produkt Confluence Server
Version 8.5.15 to 8.5.31
Status affected
Version 7.19.27 to 7.19.30
Status affected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.36% 0.288
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Atlassian 9.3 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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.

https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768
https://jira.atlassian.com/browse/CONFSERVER-104381