XWiki fixes 1 severe vulnerability

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[TLP:CLEAR] XWiki fixes 1 severe vulnerability

With versions 16.10.17, 17.4.10, 17.10.4 and 18.1.0-rc-1, XWiki Platform fixes 1 vulnerability [1].

XWiki Platform - privilege escalation (CVE-2026-53966)

CVSS 7.1 (High)

An authenticated remote attacker can escalate privileges, execute dangerous scripts (Velocity, HTML, JS) and bypass the system's security checks due to a vulnerability in the REST API of the Live Data component in XWiki [1].

The vulnerability is present in product:

XWiki Platform; >=13.4-rc-1, <16.10.17; >=17.0.0-rc-1, <17.4.10; >=17.5.0-rc-1, <17.10.4; >=18.0.0-rc-1, <18.1.0-rc-1

CVSS: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

More information:

CVE-2026-53966 at cve.org, NVD
CWE-862: Missing Authorization at cwe.mitre.org

The vulnerability was publicly disclosed 11. 6. 2026.

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[TLP:CLEAR] XWiki fixes 1 severe vulnerability

XWiki Platform - privilege escalation (CVE-2026-53966)

CVSS 7.1 (High)

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