Security readout for executives and security teams
Plain-English summary
CVE-2021-24477 affects the Migrate Users WordPress plugin through version 1.0.1. A setting called Delimiter is not safely handled before being shown on a page, allowing stored cross-site scripting. Because option saving lacks CSRF protection, an attacker may be able to trick an authenticated user into saving malicious content.
Executive priority
Address during the next WordPress maintenance cycle, sooner for externally administered or high-value sites. The issue can affect administrator trust and site integrity, but the bundle does not show active exploitation or broad severity scoring.
Technical view
The plugin fails to sanitize or escape the Delimiter option before output, creating stored XSS. It also lacks CSRF checks on option saving, so the XSS condition can be triggered through a forged request against a user with sufficient access. The source bundle does not provide CVSS, fixed-version, or exploit-in-the-wild evidence.
Likely exposure
Exposure is limited to WordPress installations using Migrate Users version 1.0.1 or earlier. Risk depends on whether privileged users can be induced to interact with attacker-controlled content while authenticated.
Exploitation context
The bundle reports CSRF-assisted stored XSS but does not cite active exploitation, KEV listing, public exploit code, or a confirmed patch. Treat exploitation as plausible for affected sites, not confirmed in the wild.
Researcher notes
Evidence is concise and primarily describes root cause: missing output escaping, missing option-save CSRF protection, and stored XSS impact. No CPEs, CVSS vector, affected vendor name, fixed version, or exploit status are provided in the source bundle.
Mitigation direction
- Identify sites running the Migrate Users WordPress plugin.
- Check vendor or WordPress plugin guidance for a fixed release.
- Disable or remove the plugin if it is not required.
- Restrict administrative access and reinforce anti-phishing controls.
- Review plugin settings for unexpected Delimiter values.
Validation and detection
- Inventory WordPress plugins and confirm Migrate Users versions.
- Flag any installation at version 1.0.1 or earlier.
- Review administrative audit logs for unexpected option changes.
- Inspect rendered plugin pages for unsafe Delimiter output.
- Confirm whether vendor guidance names an upgrade or replacement.
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-352: 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 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-2021-24477 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://wpscan.com/vulnerability/7915070f-1d9b-43c3-b01e-fec35f633a4dCVE 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.
Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) 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.