Contributor-level stored XSS via unescaped shortcode attributes
Published Apr 9, 2026 · Updated Apr 9, 2026
Stored XSS in OSM – OpenStreetMap 6.1.15 and earlier allows remote authenticated users to inject scripts through osm_map_v3 shortcode attributes. The shortcode handler accepts marker_name and file_color_list values and renders them into page output without sufficient sanitization or escaping. Contributor-level access is required to store a payload, which executes in the browser of anyone who visits the injected page.
Summary
What happened
Stored XSS in OSM – OpenStreetMap 6.1.15 and earlier allows remote authenticated users to inject scripts through osm_map_v3 shortcode attributes. The shortcode handler accepts marker_name and file_color_list values and renders them into page output without sufficient sanitization or escaping. Contributor-level access is required to store a payload, which executes in the browser of anyone who visits the injected page.
The record
- CVE
- CVE-2026-4429
- Published
- Apr 9, 2026
- Updated
- Apr 9, 2026
- Vendor
- OpenStreetMap
- Product
- OSM – OpenStreetMap
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 9, 2026CVE publishedPublication date reported by the CVE source.
- Apr 9, 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=0 <=6.1.15
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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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