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Mallory
Medium

XSS in Advanced Custom Fields 6.1.0-6.1.7

IdentifiersCVE-2023-40068CWE-79· Improper Neutralization of Input…

A cross-site scripting (XSS) vulnerability exists in Advanced Custom Fields (ACF) and ACF Pro versions 6.1.0 to 6.1.7. The vulnerability allows a remote authenticated attacker to inject arbitrary scripts that are executed in the browser of an administrative user upon login. The issue is present in both the free and Pro versions of the plugin.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an attacker with authentication to execute arbitrary JavaScript in the context of an administrator's session, potentially leading to privilege escalation, data theft, or further compromise of the WordPress site.

Mitigation

If you can’t patch tonight, do this now.

Restrict access to the WordPress admin panel to trusted users only, and ensure that all users are updated to a patched version. Consider implementing web application firewall (WAF) rules to detect and block XSS payloads as an interim measure until the plugin is updated.

Remediation

Patch, then assume compromise.

Upgrade Advanced Custom Fields and Advanced Custom Fields Pro to a version later than 6.1.7, where the vulnerability has been addressed.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
AdvancedcustomfieldsAdvanced Custom Fieldsapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.