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Fencer Intel
high 8.3

CVE-2026-125337 json

Winter CMS: ImportExportController AJAX handlers bypass granular import/export permission gate

published 2mo ago modified yesterday also GHSA-fm29-4mq3-phg6 , EUVD-2026-122882

cvss
8.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

Winter CMS is a content management system built on the Laravel PHP framework. Prior to 1.2.14, the ImportExportController behavior applies userHasAccess() only to the import() and export() page actions, while Backend\Classes\Controller::execAjaxHandlers() dispatches onImport(), onImportLoadForm(), onImportLoadColumnSampleForm(), onExport(), and onExportLoadForm() before those gated actions run, and the separately reachable download() action also lacks the granular export check. An authenticated backend user with a valid session and coarse access through $requiredPermissions, but without the configured import[permissions] or export[permissions], can use the import handlers to write or overwrite records and can use onExport() followed by download() to retrieve the complete dataset exposed by the export model. Controllers without granular permission keys are unaffected because userHasAccess() is intentionally default-permissive. This issue is fixed in version 1.2.14.

Patch / fix

  • packagist winter/wn-backend-module 1.2.14

Is CVE-2026-125337 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
yesterday

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
GitHub 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected packages

ecosystem package affected fixed in
packagist winter/wn-backend-module
<1.2.14
1.2.14

Affected products

  • wintercms winter

Classification

Weakness

References

Sources

Fencer Intel 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.