Script execution via undisclosed XSS
Published Aug 18, 2026 · Updated Aug 18, 2026
Cross-site scripting in Contact Form by Supsystic before 1.10.0 allows remote attackers to run script in a victim browser via crafted input. Patchstack, NVD, and the WordPress changelog identify the issue and the fix release, but public records do not disclose the vulnerable endpoint, parameter, or output sink that reflects attacker-controlled content. No account is required, but exploitation requires user interaction under the published UI:R vector, so reachability depends on whether a user can be induced to load attacker-supplied content from the affected site.
Summary
What happened
Cross-site scripting in Contact Form by Supsystic before 1.10.0 allows remote attackers to run script in a victim browser via crafted input. Patchstack, NVD, and the WordPress changelog identify the issue and the fix release, but public records do not disclose the vulnerable endpoint, parameter, or output sink that reflects attacker-controlled content. No account is required, but exploitation requires user interaction under the published UI:R vector, so reachability depends on whether a user can be induced to load attacker-supplied content from the affected site.
The record
- CVE
- CVE-2026-73378
- Published
- Aug 18, 2026
- Updated
- Aug 18, 2026
- Vendor
- Supsystic
- Product
- Contact Form by Supsystic
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 18, 2026CVE publishedPublication date reported by the CVE source.
- Aug 18, 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 <1.10.0 changes=[{"at":"1.10.0","status":"unaffected"}]
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.
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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