Reflected XSS via unescaped AJAX block output
Published Mar 19, 2026 · Updated Mar 19, 2026
Reflected XSS in ThemeHunk Unlimited Addons For Gutenberg Blocks 1.2.8 and earlier allows remote attackers to execute script via AJAX requests. The plugin's AJAX post and product block handlers place request-controlled values into generated block markup without neutralizing them, and the pre-fix routes lack nonce checks. No authentication is required, but a victim must interact with an attacker-crafted request; successful exploitation runs script in the victim's WordPress origin.
Summary
What happened
Reflected XSS in ThemeHunk Unlimited Addons For Gutenberg Blocks 1.2.8 and earlier allows remote attackers to execute script via AJAX requests. The plugin's AJAX post and product block handlers place request-controlled values into generated block markup without neutralizing them, and the pre-fix routes lack nonce checks. No authentication is required, but a victim must interact with an attacker-crafted request; successful exploitation runs script in the victim's WordPress origin.
The record
- CVE
- CVE-2026-25438
- Published
- Mar 19, 2026
- Updated
- Mar 19, 2026
- Vendor
- ThemeHunk
- Product
- Unlimited Addons For Gutenberg Blocks
- Classifications
- CWE-79, CAPEC-591, T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 19, 2026CVE publishedPublication date reported by the CVE source.
- Mar 19, 2026Record 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=n/a <=1.2.8
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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