Reflected XSS and file disclosure via help parameters
Published Apr 8, 2026 · Updated Apr 8, 2026
Reflected XSS in ACElab LORIS help_editor 15.10 through 27.0.2 and 28.0.0 allows remote authenticated users to run script. In help.php, testName and subtest are read from request data; Module::getHelp appended the page value to a Markdown path and returned file content or unsafely reflected error text without a JSON content type or path-containment check. A low-privileged account and victim interaction are required for script execution; the same request path reads Markdown files that resolve outside the module help directory.
Summary
What happened
Reflected XSS in ACElab LORIS help_editor 15.10 through 27.0.2 and 28.0.0 allows remote authenticated users to run script. In help.php, testName and subtest are read from request data; Module::getHelp appended the page value to a Markdown path and returned file content or unsafely reflected error text without a JSON content type or path-containment check. A low-privileged account and victim interaction are required for script execution; the same request path reads Markdown files that resolve outside the module help directory.
The record
- CVE
- CVE-2026-35169
- Published
- Apr 8, 2026
- Updated
- Apr 8, 2026
- Vendor
- ACElab
- Product
- LORIS
- Classifications
- CWE-552, CWE-79, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 8, 2026CVE publishedPublication date reported by the CVE source.
- Apr 8, 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=>= , < 27.0.3
- Affected versionversion=>= 28.0.0, < 28.0.1
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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