CVE-2026-6812

Ona <= 1.26 - Authenticated (Administrator+) Blind Server-Side Request Forgery via 'download_link' Parameter

2026-05-01 16:42

Strategic Overview

Status: Patched in 1.27
Affected Theme: Ona
Affected Version: <= 1.26
CVSS: 4.4Medium
Weakness type: CWE-918 · Server-Side Request Forgery (SSRF)
CVE: CVE-2026-6812

At a glance

CVE-2026-6812 is a medium-severity Server-Side Request Forgery (SSRF) vulnerability in the Ona WordPress theme, affecting versions <= 1.26. It carries a CVSS score of 4.4 (reachable over the network). Exploitation requires an authenticated account at Administrator level or above. The issue is fixed in version 1.27; sites on affected versions should update now. Disclosed May 2026, reported by Nguyen Truong (Roll).

Vulnerability Overview

The Ona theme for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.26 via the ona_activate_child_theme. This makes it possible for authenticated attackers, with administrator-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, and no interaction from a victim user.

CWE-918: Server-Side Request Forgery (SSRF)

Reaching this weakness in Ona <= 1.26 takes an account at Administrator level or above. Server-side request forgery means the application fetches a URL supplied by the caller, turning the server into a proxy for requests the attacker could not make directly.

The request originates from inside the hosting network, which is how these flaws reach cloud metadata endpoints, internal admin panels and services that trust local traffic. For Ona the fix is 1.27: builds <= 1.26 are affected, anything from 1.27 onward is not.

Remediation

Update to version 1.27, or a newer patched version

How does WordSec protect against this?

An attacker needs Administrator access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Ona 1.27 closes this, and updating the theme is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-6812 https://www.wordfence.com/threat-intel/vulnerabilities/id/0acb365c-b5f2-4377-875b-69278a8ff96e https://nvd.nist.gov/vuln/detail/CVE-2026-6812

Related records

Other vulnerabilities in Ona

CVSS Vector

4.4

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredHigh
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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