CVE-2026-33137 json
XWiki Platform has an Unauthenticated XAR Import via REST /wikis/{wikiName}
published 2026-05-20 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-31157 , GHSA-qrvh-r3f2-9h4r
- cvss
- 9.3
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- maven org.xwiki.platform:xwiki-platform-rest-server 16.10.17, 17.4.9, 17.10.3, 18.1.0-rc-1
- xwiki xwiki 16.10.17, 17.4.9, 17.10.3, 18.1.0-rc-1
- org.xwiki.platform xwiki-platform-rest-server 16.10.17, 17.4.9, 17.10.3, 18.1.0-rc-1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.3 | 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 |
| CNA | 4.0 | 9.3 | 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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.xwiki.platform:xwiki-platform-rest-server | >=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-1 |
16.10.17 17.4.9 17.10.3 18.1.0-rc-1 |
Affected products
- xwiki xwiki-platform
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
Sources
- CVE List CVE-2026-33137
- GitHub Advisory GHSA-qrvh-r3f2-9h4r
- NVD CVE-2026-33137
Fencer Vulns 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.