Stored script execution via unsanitized category fields
Published Nov 1, 2021 · Updated Mar 31, 2025
Stored XSS in Supsystic Google Maps Easy 1.9.33 and earlier allows remote authenticated users to inject scripts through marker-category fields. The marker-group editor accepts and stores attacker-controlled Category Title input without sufficient validation or sanitization, then renders it as executable markup. Administrator access is required to plant the payload, and execution requires another user to view the affected content where unfiltered_html is disabled.
Summary
What happened
Stored XSS in Supsystic Google Maps Easy 1.9.33 and earlier allows remote authenticated users to inject scripts through marker-category fields. The marker-group editor accepts and stores attacker-controlled Category Title input without sufficient validation or sanitization, then renders it as executable markup. Administrator access is required to plant the payload, and execution requires another user to view the affected content where unfiltered_html is disabled.
The record
- CVE
- CVE-2021-39346
- Published
- Nov 1, 2021
- Updated
- Mar 31, 2025
- Vendor
- Supsystic
- Product
- Google Maps Easy
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Nov 1, 2021CVE publishedPublication date reported by the CVE source.
- Mar 31, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.9.33 <=1.9.33
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
- Google Maps Easy 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
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo