CVE-2026-33137
Unauthenticated POST /wikis/{wikiName} import allows create/update of wiki content.
Is CVE-2026-33137 being exploited?
Not confirmed. CVE-2026-33137 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.59% probability of exploitation in the next 30 days.
How severe is CVE-2026-33137?
CVE-2026-33137 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-33137?
Yes. A fix has been recorded for CVE-2026-33137. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-33137 affect?
CVE-2026-33137 affects XWiki Platform (pre-18.1.0-rc-1, 17.10.3, 17.4.9, 16.10.17). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33137?
Upgrade to patched release (18.1.0-rc-1+ or newer).
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated write access to wiki content via POST /wikis/{wikiName}, enabling document creation or updates.
Immediate action required
- affected>= 15.10.6 and < 16.10.17
- affected>= 17.0.0-rc-1 and < 17.4.9
- affected>= 17.5.0 and < 17.10.3
- affected>= 18.0.0-rc-1 and < 18.1.0-rc-1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.