CVE-2026-39600

Aculect AI Companion <= 0.8.2 - Missing Authorization to Unauthorized Redirects

2026-10-02 00:00

Strategic Overview

Status: Patched in 0.8.3
Affected Plugin: Aculect AI Companion
Affected Version: <= 0.8.2
CVSS: 7.3High
Weakness type: CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
CVE: CVE-2026-39600

View all Aculect AI Companion vulnerabilities

At a glance

CVE-2026-39600 is a high-severity URL Redirection to Untrusted Site ('Open Redirect') vulnerability in the Aculect AI Companion WordPress plugin, affecting versions <= 0.8.2. It carries a CVSS score of 7.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 0.8.3; sites on affected versions should update now. Disclosed October 2026, reported by Ananda Dhakal.

Vulnerability Overview

The Aculect AI Companion plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in all versions up to, and including, 0.8.2. This makes it possible for unauthenticated attackers to set unauthorized redirects.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

Reaching this weakness in Aculect AI Companion <= 0.8.2 takes a caller who can reach the endpoint. An open redirect is a page that takes a destination from the request and sends the browser there without checking that the destination belongs to the site.

A link that starts on a trusted domain finishes on an attacker's, which is what makes phishing and consent-screen abuse credible to the person clicking it. For Aculect AI Companion the fix is 0.8.3: builds <= 0.8.2 are affected, anything from 0.8.3 onward is not.

Remediation

Update to version 0.8.3, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Aculect AI Companion: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Aculect AI Companion 0.8.3 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-39600 https://www.wordfence.com/threat-intel/vulnerabilities/id/b5847c98-7880-4dda-a5d9-9597763fde6b https://nvd.nist.gov/vuln/detail/CVE-2026-39600

CVSS Vector

7.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityLow

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