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NVD / CVE Program· CNA GitHub_M

CVE-2026-33137: XWiki Platform has an Unauthenticated XAR Import via REST /wikis/{wikiName}

Noroxi assessment

Priority: Monitor (action score 37/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.59% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: org.xwiki.platform:xwiki-platform-rest-server (Maven) 16.10.17, 17.4.9, 17.10.3.

Low priority for now. Upgrade to org.xwiki.platform:xwiki-platform-rest-server (Maven) 16.10.17, 17.4.9, 17.10.3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. XWiki Platform is a generic wiki platform. In versions starting with 15.10.6 and prior to 18.1.0-rc-1, 17.10.3, 17.4.9, and 16.10.17, the POST /wikis/{wikiName} API executes a XAR import without performing any authentication or authorization checks, allowing an unauthenticated attacker to create or update documents in the target wiki. This vulnerability has been patched in XWiki 16.10.17, 17.4.9, 17.10.3, 18.0.1 and 18.1.0-rc-1.

CriticalCVSS 9.3 · v4.0—Proof of concept Fix available
Published
May 20, 2026
Updated
Jul 23, 2026
EPSS
0.5% · 48th percentile

Report tools

JSON

Action score

37

Monitor

Low priority for now.

CVSS
37 / 40 · 9.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
9.3
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-33137

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • xwiki xwiki-platform

    • >= 15.10.6, < 16.10.17, >= 17.0.0-rc-1, < 17.4.9, >= 17.5.0, < 17.10.3, >= 18.0.0-rc-1, < 18.1.0-rc-1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Mavenorg.xwiki.platform:xwiki-platform-rest-serverfrom 15.10.6 · before 16.10.1716.10.17
Mavenorg.xwiki.platform:xwiki-platform-rest-serverfrom 17.0.0-rc-1 · before 17.4.917.4.9
Mavenorg.xwiki.platform:xwiki-platform-rest-serverfrom 17.5.0 · before 17.10.317.10.3
Mavenorg.xwiki.platform:xwiki-platform-rest-serverfrom 18.0.0-rc-1 · before 18.1.0-rc-118.1.0-rc-1

Same product

xwiki: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-52472XWiki Platform vulnerable to HQL injection via wiki and space search REST API
    38Monitor
  • CVE-2026-34151XWiki Platform: Resource path traversal via /skin/ action endpoint in Jetty 12+
    33Monitor
  • CVE-2026-48048XWiki Platform's Livetable results still allow reconstructing password hashes using 768 requests
    31Monitor

Published before and after this one in the same product

  • Later →CVE-2026-48047Aug 7, 2026 · XWiki Platform vulnerable to potential arbitrary file writing using path traversal from (subwiki) admin
    23Monitor
  • Later →CVE-2026-53966Sep 15, 2026 · XWiki Platform: Privilege escalation from edit to script right through Live Data editing
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Maven:org.xwiki.platform:xwiki-platform-rest-server16.10.17Package registry (OSV)
Maven:org.xwiki.platform:xwiki-platform-rest-server17.10.3Package registry (OSV)
Maven:org.xwiki.platform:xwiki-platform-rest-server17.4.9Package registry (OSV)
Maven:org.xwiki.platform:xwiki-platform-rest-server18.1.0-rc-1Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02026-05-25

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+4 d
  3. TodayNov 2, 2026+165 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-53966118 days apartXWiki Platform: Privilege escalation from edit to script right through Live Data editing
    28Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-862 · Missing Authorization

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Exploit maturitynone → poc
  2. Exploit maturitypoc → none
  3. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records