Security readout for executives and security teams
Plain-English summary
CVE-2025-31090 is a stored cross-site scripting issue in the WordPress Dropdown Multisite selector plugin before 0.9.4. An authenticated user with limited privileges could store malicious web content that runs when another user views the affected page. Business risk is account/session exposure or site administration impact, but the sources do not show active exploitation.
Executive priority
Treat as a moderate-priority web application issue. It is not currently supported as actively exploited, but stored XSS can affect privileged WordPress sessions. Patch or disable affected plugin instances during the next normal security maintenance window, sooner for externally managed or high-value multisite environments.
Technical view
The CVE describes CWE-79 improper input neutralization during web page generation in alordiel Dropdown Multisite selector, package dropdown-multisite-selector. Affected versions are below 0.9.4. CVSS 3.1 is 6.5: network exploitable, low complexity, low privileges required, user interaction required, changed scope, low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress installations using the Dropdown Multisite selector plugin below 0.9.4. Multisite deployments using this plugin should be prioritized. Sites not running this plugin, or running 0.9.4 or later, are not indicated as affected by the supplied sources.
Exploitation context
The sources support a stored XSS condition requiring low privileges and victim interaction. There is no KEV listing and no supplied source claiming active exploitation. The available detail does not identify a specific vulnerable field, role threshold, or real-world attack campaign.
Researcher notes
Evidence is sparse beyond CVE metadata and Patchstack. The CVSS vector indicates authenticated, low-complexity exploitation with user interaction and changed scope. Do not assume unauthenticated exploitability, affected fields, or exploitation in the wild without additional vendor or researcher detail.
Mitigation direction
- Inventory WordPress sites for dropdown-multisite-selector installations.
- Update Dropdown Multisite selector to 0.9.4 or later if available.
- If update is unavailable, disable the plugin until vendor guidance is confirmed.
- Limit plugin-related write permissions to trusted users.
- Monitor Patchstack and CVE records for updated remediation guidance.
Validation and detection
- Confirm installed plugin version on each WordPress site.
- Verify whether any instance runs a version below 0.9.4.
- Review plugin-managed content or settings for unexpected script content.
- Check WordPress users with permission to modify relevant plugin data.
- Document unaffected sites running 0.9.4 or later.
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-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-2025-31090 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
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
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:L/UI:R/S:C/C:L/I:L/A:L2.33.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Source materials
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.