CVE-2026-7595: nextlevelbuilder ui-ux-pro-max-skill RCE Flaw

CVE-2026-7595 Overview

CVE-2026-7595 is a code injection vulnerability in the nextlevelbuilder ui-ux-pro-max-skill project up to version 2.5.0. The flaw resides in the _format_plugins function within .claude/skills/ui-styling/scripts/tailwind_config_gen.py, part of the Tailwind Config Generator component. Attackers can exploit the issue remotely with low privileges. A public exploit has been released, and the project maintainers were notified through a pull request but have not yet responded. The weakness is classified as [CWE-74] Improper Neutralization of Special Elements in Output Used by a Downstream Component.

Critical Impact

Remote attackers with low privileges can inject and execute attacker-controlled code through the Tailwind Config Generator, with a public exploit already available.

Affected Products

• nextlevelbuilder ui-ux-pro-max-skill versions up to and including 2.5.0
• Component: Tailwind Config Generator (.claude/skills/ui-styling/scripts/tailwind_config_gen.py)
• Function: _format_plugins

Discovery Timeline

• 2026-05-01 - CVE-2026-7595 published to NVD
• 2026-05-05 - Last updated in NVD database

Technical Details for CVE-2026-7595

Vulnerability Analysis

The vulnerability lives in the _format_plugins function of tailwind_config_gen.py. This routine builds a Tailwind CSS configuration file by formatting plugin definitions supplied at runtime. Because the function does not neutralize special characters before writing the values into generated code, attacker-controlled input is incorporated directly into the resulting configuration script. When that generated configuration is later evaluated, injected statements run with the privileges of the user invoking the generator.

The issue is reachable over the network according to the CVSS vector and requires low privileges with no user interaction. The published exploit lowers the barrier for opportunistic abuse against developers who run the skill locally or in shared automation pipelines. The Exploit Prediction Scoring System places the probability of exploitation at 0.058% with a percentile of 17.904, but that figure does not account for the publicly available proof of concept.

Root Cause

The root cause is improper neutralization of input passed into a code-generation context [CWE-74]. The _format_plugins helper concatenates plugin entries into a Python or JavaScript configuration string without escaping or validating the contents. Any value that contains executable syntax becomes part of the generated artifact and is later interpreted as code rather than data.

Attack Vector

An attacker who can influence the plugin input fed to the Tailwind Config Generator embeds malicious code fragments that survive the formatting routine. When the generated configuration is loaded by tooling that imports or executes it, the attacker payload runs in that process. The CVSS 4.0 vector indicates low impact to confidentiality, integrity, and availability, but in development environments the consequence can extend to credential theft, supply chain tampering, or pivoting through CI runners.

No verified exploitation code is reproduced here. Refer to the GitHub Issue #246 and VulDB Vulnerability #360548 for technical details on the published proof of concept.

Detection Methods for CVE-2026-7595

Indicators of Compromise

• Unexpected modifications to generated tailwind.config.js or related output files produced by tailwind_config_gen.py.
• Plugin entries containing quotes, backticks, parentheses, or shell metacharacters that are uncommon in legitimate Tailwind plugin names.
• Outbound network connections initiated by Node.js or Python processes immediately after Tailwind config generation.

Detection Strategies

• Inspect input sources for the Tailwind Config Generator and flag any values that include code-like syntax before invocation.
• Diff generated configuration files against a known-good baseline to surface injected statements.
• Audit version control history for changes to .claude/skills/ui-styling/scripts/tailwind_config_gen.py and the configuration files it produces.

Monitoring Recommendations

• Monitor developer workstations and CI runners for unexpected child processes spawned by Node, Python, or build tooling that loads Tailwind configs.
• Alert on file writes to .claude/skills/ paths from non-developer accounts.
• Track installations or updates of the ui-ux-pro-max-skill package and pin versions until a fix is released.

How to Mitigate CVE-2026-7595

Immediate Actions Required

• Stop using ui-ux-pro-max-skill versions up to 2.5.0 in environments that process untrusted plugin input.
• Review the contents of any configuration files previously generated by tailwind_config_gen.py and rebuild them from trusted inputs.
• Restrict execution of the skill to isolated, non-privileged accounts until the maintainer ships a patch.

Patch Information

No official patch is currently available. The maintainers were notified through GitHub Pull Request #275 but have not yet merged a fix. Track the GitHub Project Repository and VulDB CTI for #360548 for updates.

Workarounds

• Apply the proposed fix from GitHub Pull Request #275 as a local patch after independent review.
• Replace the _format_plugins routine with a serializer that escapes or whitelists plugin identifiers and rejects values containing executable syntax.
• Run the Tailwind Config Generator inside a sandbox or container with no network access and no credentials mounted.
• Validate plugin names against a strict allowlist before they reach the generator.

# Configuration example: pin to a vulnerable-free workflow until a patch lands
# 1. Remove the skill from active project paths
rm -rf .claude/skills/ui-styling

# 2. Block reinstallation by recording the affected version
echo "ui-ux-pro-max-skill<=2.5.0  # CVE-2026-7595 - do not install" >> SECURITY_BLOCKLIST.txt