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CVE-2026-17153

5.3 · MEDIUM

The AI Agent by SiteGround plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.2.7.

Published Aug 20, 2026CWE-862EPSS 0.46%

Overview

CVE-2026-17153 is a medium-severity vulnerability. It was published on August 20, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The AI Agent by SiteGround plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.2.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to upload images to the WordPress media library, bypassing the upload_files capability restriction that Contributors are normally subject to, as authenticated attackers with Contributor-level access or above can satisfy the endpoint's nonce and permission checks. The sg_ai_studio_gutenberg_nonce required by the endpoint is emitted to any user with block editor access — including Contributors — making the absent upload_files check the sole barrier to exploitation.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refplugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Helper/Helper.php#L1077Refplugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Helper/Helper.php#L604Refplugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Gutenberg.php#L118Refplugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Rest.php#L325Refplugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Rest.php#L474Refplugins.trac.wordpress.org/changeset?reponame=&old=3654622%40sg-ai-studio&new=3654622%40sg-ai-studioRefwww.wordfence.com/threat-intel/vulnerabilities/id/6280f40e-2998-43d4-a78f-b393e4f36df5?source=cve

How CyberStrike helps

Frequently asked questions

What is CVE-2026-17153?

CVE-2026-17153 is a medium-severity vulnerability. It was published on August 20, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-17153?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-17153?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-17153?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-17153 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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