CVE-2026-53966

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.8% (54th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity71% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.8%
EPSS %ILE
54th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 19, 2026

Last Modified

September 30, 2026

Advisory Details (10)

Auto-updated Sep 15, 2026
Patch available. Sources: github, github_commit, github_release.
generic

Loading...

https://jira.xwiki.org/browse/XWIKI-23986
github_release Patch Available

18.1.0-rc-1

Patch available: xwiki/xwiki-platform xwiki-platform-18.1.0-rc-1

https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.1.0-rc-1
github_release Patch Available

17.4.10

Patch available: xwiki/xwiki-platform xwiki-platform-17.4.10

https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.4.10
github_release Patch Available

17.10.4

Patch available: xwiki/xwiki-platform xwiki-platform-17.10.4

https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.4
github_release Patch Available

16.10.17

Patch available: xwiki/xwiki-platform xwiki-platform-16.10.17

https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-16.10.17
github_commit Patch Available

commit fbad7dac8f46 (xwiki/xwiki-platform)

Patch available: xwiki/xwiki-platform xwiki-platform-17.10.4 (contains commit fbad7dac8f46)

https://github.com/xwiki/xwiki-platform/commit/fbad7dac8f46c560577e41b9259cbbbbd343e6fc
github_commit

commit 778b82b4806c (xwiki/xwiki-platform)

Fix landed in xwiki/xwiki-platform commit 778b82b4806c — awaiting tagged release

https://github.com/xwiki/xwiki-platform/commit/778b82b4806ce7ebddb775f953545ff73b841f8b
github_commit Patch Available

commit 448b0f074cc6 (xwiki/xwiki-platform)

Patch available: xwiki/xwiki-platform xwiki-platform-18.1.0 (contains commit 448b0f074cc6)

https://github.com/xwiki/xwiki-platform/commit/448b0f074cc6711410eb2647c4740454c92d1626
github_commit

commit 1ddb954767e5 (xwiki/xwiki-platform)

Fix landed in xwiki/xwiki-platform commit 1ddb954767e5 — awaiting tagged release

https://github.com/xwiki/xwiki-platform/commit/1ddb954767e50782be960b953b012c1242f6843b
github Patch Available

Privilege escalation from edit to script right through Live Data editing · Advisory · xwiki/xwiki-platform · GitHub

https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-45ph-gxxr-gwgw

Vendor Advisories for CVE-2026-53966(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
org.xwiki.platform:xwiki-platform-livedata-livetable—
  • 13.4-rc-1 up to 16.10.17: fixed in 16.10.17
  • 17.0.0-rc-1 up to 17.4.10: fixed in 17.4.10
  • 17.5.0-rc-1 up to 17.10.4: fixed in 17.10.4
  • 18.0.0-rc-1 up to 18.1.0-rc-1: fixed in 18.1.0-rc-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 36× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-03 16:55 UTCEG score recompute
  2. 2026-10-03 14:26 UTCEPSS rescore
  3. 2026-10-02 21:59 UTCEG score recompute
  4. 2026-10-02 17:56 UTCEPSS rescore
  5. 2026-10-01 22:46 UTCEG score recompute
  6. 2026-10-01 19:50 UTCEPSS rescore
  7. 2026-09-30 17:51 UTCEG score recompute
  8. 2026-09-30 15:03 UTCEPSS rescore
  9. 2026-09-30 08:41 UTCEG score recompute
  10. 2026-09-29 15:22 UTCEPSS rescore
  11. 2026-09-28 21:42 UTCEG score recompute
  12. 2026-09-28 13:51 UTCEPSS rescore
  13. 2026-09-27 17:49 UTCEG score recompute
  14. 2026-09-27 13:48 UTCEPSS rescore
  15. 2026-09-27 06:12 UTCEG score recompute
  16. 2026-09-26 15:59 UTCEPSS rescore
  17. 2026-09-24 19:43 UTCEG score recompute
  18. 2026-09-24 14:04 UTCEPSS rescore
  19. 2026-09-23 20:08 UTCEG score recompute
  20. 2026-09-23 17:54 UTCEPSS rescore
  21. 2026-09-22 19:49 UTCEG score recompute
  22. 2026-09-22 08:13 UTCEG score recompute
  23. 2026-09-20 21:10 UTCEG score recompute
  24. 2026-09-20 20:16 UTCEPSS rescore
  25. 2026-09-19 21:52 UTCEG score recompute
Show 12 more
  1. 2026-09-18 21:43 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 21:29 UTCEG score recompute
  4. 2026-09-17 19:31 UTCEPSS rescore
  5. 2026-09-16 20:05 UTCEG score recompute
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-15 19:41 UTCEG score recompute
  8. 2026-09-15 18:25 UTCEG score recompute
  9. 2026-09-15 15:34 UTCEG score recompute
  10. 2026-09-15 14:43 UTCEG score recompute▲ 7.10
  11. 2026-09-15 14:42 UTCMITRE cvelistV5CVSS v3 → 7.1 · CVSS v4 → 7.1
  12. 2026-08-19 19:42 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-53966?
CVE-2026-53966 is a high vulnerability published on August 19, 2026. 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…
When was CVE-2026-53966 disclosed?
CVE-2026-53966 was first published on August 19, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53966 actively exploited?
CVE-2026-53966 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53966?
CVE-2026-53966 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53966?
A fix for CVE-2026-53966 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53966 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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