Administrator stored XSS via unescaped settings
Published Jun 7, 2024 · Updated Aug 1, 2024
Stored XSS in WP Backpack 2.1 and earlier allows remote authenticated users to execute scripts through crafted administrator settings. The settings page at wp-admin/admin.php?page=optik stores text input and later renders it without adequate sanitization or output escaping. Administrator access is required, and a later page load executes the stored payload even when unfiltered_html is disabled, including on multisite deployments.
Summary
What happened
Stored XSS in WP Backpack 2.1 and earlier allows remote authenticated users to execute scripts through crafted administrator settings. The settings page at wp-admin/admin.php?page=optik stores text input and later renders it without adequate sanitization or output escaping. Administrator access is required, and a later page load executes the stored payload even when unfiltered_html is disabled, including on multisite deployments.
The record
- CVE
- CVE-2024-4756
- Published
- Jun 7, 2024
- Updated
- Aug 1, 2024
- Vendor
- Christoph Kleinschmidt
- Product
- WP Backpack
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jun 7, 2024CVE publishedPublication date reported by the CVE source.
- Aug 1, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=2.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- WPScan administrator settings stored XSS proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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