CVE-2026-114622 baserCMS - Path Traversal & Remote Code Execution

baserCMS 5.2.3 < 5.3.2 and 5.4.0 < 5.4.2 with BcThemeFile plugin contains a path traversal caused by improper validation and decoding order in ThemeFilesService and ThemeFileForm, letting authenticated administrators write and execute PHP files outside theme directory, exploit requires administrator session and same-origin Origin header.

CVSS base score 7.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.66% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Path Traversal
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
23 October 2026
Updated
25 October 2026
Weakness
CWE-22

Vendor fix

Update to versions 5.3.2 or 5.4.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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