Stored XSS via unescaped location custom field
Published Aug 25, 2026 · Updated Aug 26, 2026
Stored XSS in YOOtheme Pro 1.0.0 through 5.0.41 allows remote authenticated users to execute script through the location custom field. The Joomla location custom field renders its stored value without escaping, allowing injected markup and script to persist in generated page content. Exploitation requires privileged access to modify the field, and execution is limited to the browser context that renders the stored value.
Summary
What happened
Stored XSS in YOOtheme Pro 1.0.0 through 5.0.41 allows remote authenticated users to execute script through the location custom field. The Joomla location custom field renders its stored value without escaping, allowing injected markup and script to persist in generated page content. Exploitation requires privileged access to modify the field, and execution is limited to the browser context that renders the stored value.
The record
- CVE
- CVE-2026-77996
- Published
- Aug 25, 2026
- Updated
- Aug 26, 2026
- Vendor
- YOOtheme
- Product
- YOOtheme Pro
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Aug 25, 2026CVE publishedPublication date reported by the CVE source.
- Aug 26, 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=1.0.0-5.0.41
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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