Security readout for executives and security teams
Plain-English summary
Movary versions before 0.70.0 have a cross-site scripting flaw in the categoryUpdated URL parameter. An attacker could trick a user into opening a crafted Movary link, potentially running script in that user’s browser session. The vendor states version 0.70.0 fixes the issue.
Executive priority
Treat as urgent for any exposed or business-critical Movary instance, especially where admins use the application. The fix is identified, so prioritize upgrade over temporary controls. If Movary is not deployed, no action is required beyond confirming inventory.
Technical view
CVE-2026-23839 affects leepeuker Movary before 0.70.0. The issue is insufficient input validation leading to XSS via the ?categoryUpdated= parameter. CVSS 3.1 is 9.3 with network attack vector, low complexity, no privileges required, user interaction required, changed scope, high confidentiality and integrity impact, and no availability impact.
Likely exposure
Exposure is limited to organizations running Movary versions earlier than 0.70.0. Risk is higher where Movary is internet-accessible or used by privileged users. The source bundle does not identify affected hosted services beyond the Movary application itself.
Exploitation context
The CVSS vector requires user interaction, so exploitation likely depends on persuading a user to open a malicious link or page. The CVE record and provided sources do not state active exploitation, and it is not listed as KEV in the supplied data.
Researcher notes
The public data maps this to CWE-20 and CWE-79. The vulnerable surface is the categoryUpdated query parameter. Available sources identify the fixed version but do not provide broader exploitation telemetry. Avoid assuming compromise without logs or other evidence.
Mitigation direction
- Upgrade Movary to version 0.70.0 or later.
- Review the GitHub advisory and 0.70.0 release notes.
- Restrict external access to Movary where business requirements allow.
- Educate users to avoid untrusted Movary links until patched.
Validation and detection
- Inventory all Movary deployments and record versions.
- Confirm production is running Movary 0.70.0 or later.
- Review web logs for unusual categoryUpdated parameter activity.
- Validate remediation in a test environment using benign input only.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-23839 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N2.85.8Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.3CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/leepeuker/movary/security/advisories/GHSA-v32w-5qx7-p3vqCVE reference · x_refsource_CONFIRM
- https://github.com/leepeuker/movary/blob/main/public/js/settings-account-location.js#L237CVE reference · x_refsource_MISC
- https://github.com/leepeuker/movary/releases/tag/0.70.0CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.