Medium severity · published Oct 16, 2026
CVE-2026-93767
Tainacan <= 1.3.0 - Authenticated (Subscriber+) Path Traversal to Arbitrary File Read via 'guid' Parameter
6.5
CVSS
0.6%
EPSS
No
On KEV
Description
The Tainacan plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 1.3.0 via the 'guid' parameter parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information. This vulnerability is exploitable only when the uploads/tainacan directory does not exist on the server, as this condition causes realpath() to return false, collapsing the base path to an empty string and rendering the containment check ineffective.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TA
Tainacan · tainacan
through 1.3.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93767
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-93767
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-background-processes-controller.php#L147
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-background-processes-controller.php#L391
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-background-processes-controller.php#L393
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-background-processes-controller.php#L418
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset?reponame=&old=3733197%40tainacan&new=3733197%40tainacan
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/4ff75bf6-c8c3-43f5-bc71-0e54e892e664?source=cve
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