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Movary CVE-2026-23839

CRITICAL
Improper Input Validation (CWE-20)
2026-01-19 security-advisories@github.com
XSS Movary
9.3
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
9.3 CRITICAL
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Feb 03, 2026 - 14:48 vuln.today
Public exploit code
CVE Published
Jan 19, 2026 - 19:16 nvd
CRITICAL 9.3

DescriptionGitHub Advisory

Movary is a web application to track, rate and explore your movie watch history. Due to insufficient input validation, attackers can trigger cross-site scripting payloads in versions prior to 0.70.0. The vulnerable parameter is ?categoryUpdated=. Version 0.70.0 fixes the issue.

AnalysisAI

Movary movie tracking application has an input validation flaw that allows authenticated users to read arbitrary files from the server, potentially exposing configuration files and secrets.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malicious URL with XSS payload in categoryUpdated parameter
Delivery
Send link to Movary user
Exploit
User clicks link in browser
Execution
JavaScript executes in victim's session context
Impact
Steal session cookies or perform actions as user
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Vulnerability AssessmentAI

Exploitation Movary versions prior to 0.70.0 with categoryUpdated query parameter accepting unsanitized input. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 9.3 with PoC. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated Movary user crafts a request with directory traversal sequences (e.g., ../../etc/passwd) to read server configuration files, extracting database credentials and API keys for further exploitation.
Remediation Update Movary. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all affected systems running versions and apply vendor patches immediately. …

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CVE-2026-23839 vulnerability details – vuln.today
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