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Fencer Intel
high 7.1

CVE-2026-53966 json

XWiki Platform: Privilege escalation from edit to script right through Live Data editing

published 2mo ago modified last mo. also EUVD-2026-78592 , GHSA-45ph-gxxr-gwgw

cvss
7.1
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

XWiki Platform is a generic wiki platform. From 13.4-rc-1 until 16.10.17, 17.4.10, 17.10.4, and 18.1.0-rc-1, the Live Data edit REST API allows a user who can edit a page to change that page's rights without executing the normal document-saving authorization checks. The user can grant script right and then execute potentially dangerous Velocity scripts or send unfiltered HTML and JavaScript to clients. The same missing checks can circumvent extension security controls implemented as listeners for UserUpdatingDocumentEvent and related user document events. This issue is fixed in versions 16.10.17, 17.4.10, 17.10.4, and 18.1.0-rc-1.

Patch / fix

  • maven org.xwiki.platform:xwiki-platform-livedata-livetable 16.10.17, 17.4.10, 17.10.4, 18.1.0-rc-1
  • org.xwiki.platform xwiki-platform-livedata-livetable 16.10.17, 17.4.10, 17.10.4, 18.1.0-rc-1
  • xwiki xwiki 16.10.17, 17.4.10, 17.10.4, 18.1.0-rc-1

Is CVE-2026-53966 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-53966 updated cvss 8.8

org.xwiki.platform/xwiki-platform-livedata-livetable: XWiki Platform: Privilege Escalation and Arbitrary Code Execution

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last mo.

Exploit prediction

0.77% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 4.0 7.1 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
CNA 4.0 7.1 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/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

Affected packages

ecosystem package affected fixed in
maven org.xwiki.platform:xwiki-platform-livedata-livetable
>=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
16.10.17
17.4.10
17.10.4
18.1.0-rc-1

Affected products

  • xwiki xwiki-platform

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.