CVE-2026-33137: critical vulnerability in xwiki-platform
XWiki Platform has an Unauthenticated XAR Import via REST /wikis/{wikiName}
Published · Updated
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.3epss 0.6%
from disclosure to weapon5 days
Published on NVDMay 20
1st PoC+5d
exploitation probability
0.6%top 52% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
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
Affected products
xwiki · xwiki-platformpublic PoCs found — 1
githubgithub.com/portbuster1337/CVE-2026-33137★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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