Missing authorization in SiteGround AI Agent by SiteGround
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| SiteGround | AI Agent by SiteGround | up to 1.2.7 | — | No fix listed | CNA |
- AI Agent by SiteGround VendorSiteGround Affected up to 1.2.7 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-17153
- 2026-10-03 Alias added: GHSA-qg2p-54pj-chvp
References
Other 7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/6280f40e-2998-43d4-a78f-b393e4f36df5?source=cve
- https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Rest.php#L474
- https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Rest.php#L325
- https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Helper/Helper.php#L1077
- https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Helper/Helper.php#L604
- https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Gutenberg.php#L118
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3654622%40sg-ai-studio&new=3654622%40sg-ai-studio
More SiteGround vulnerabilities
- TI-2022-00891 SiteGround Security <= 1.2.5 - Authentication Bypass via 2FA Setup CVSS 3.1CRITICAL 9.8
- TI-2022-00892 SiteGround Security <= 1.2.5 - Authorization Weakness to Authentication Bypass CVSS 3.1CRITICAL 9.8
- TI-2023-00224 SiteGround Security < 1.3.1 - Admin+ SQLi CVSS 3.1HIGH 8.8
- TI-2019-15271 SiteGround Optimizer <= 5.0.12 - Missing Authorization CVSS 3.1CRITICAL 9.8
- TI-2026-56695 WordPress SiteGround Security plugin <= 1.6.6 - 2FA Bypass vulnerability CVSS 3.1HIGH 8.1
- TI-2026-41353 WordPress SiteGround Email Marketing plugin <= 1.7.5 - Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
Sources
- CVE-2026-17153 · CVE Program
- CVE-2026-17153 · NVD
- FIRST EPSS
- GHSA-qg2p-54pj-chvp · GitHub Advisory Database · CC BY 4.0
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