Stored XSS via unencoded JavaScript option interpolation
Published Jun 10, 2026 · Updated Jun 10, 2026
Stored XSS in QuantumCloud Simple Link Directory through 9.0.4 allows remote authenticated users to run script in visitors’ browsers. The plugin inserts the stored sld_no_results_found option into a JavaScript string literal without context-specific encoding, while sanitize_text_field preserves quote characters. Low-privileged authenticated access is required to save the option; the payload then executes for every visitor to an affected page.
Summary
What happened
Stored XSS in QuantumCloud Simple Link Directory through 9.0.4 allows remote authenticated users to run script in visitors’ browsers. The plugin inserts the stored sld_no_results_found option into a JavaScript string literal without context-specific encoding, while sanitize_text_field preserves quote characters. Low-privileged authenticated access is required to save the option; the payload then executes for every visitor to an affected page.
The record
- CVE
- CVE-2026-53741
- Published
- Jun 10, 2026
- Updated
- Jun 10, 2026
- Vendor
- QuantumCloud
- Product
- Simple Link Directory
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 10, 2026CVE publishedPublication date reported by the CVE source.
- Jun 10, 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 <=9.0.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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
No sourced classifications are available.
Public exploit references
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Technologies
Your stack
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Your stack
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