Security readout for executives and security teams
Plain-English summary
CVE-2021-24470 is a stored cross-site scripting issue in the Yada Wiki WordPress plugin before 3.4.1. A user with Contributor-level access or higher could store unsafe shortcode anchor content that later runs in a visitor’s browser.
Executive priority
Prioritize remediation on public WordPress sites or sites with many content contributors. This is not KEV-listed in the provided sources, but stored XSS can affect users and administrators who view poisoned content.
Technical view
The flaw is CWE-79 in the Yada Wiki shortcode anchor attribute. The plugin did not sanitize, validate, or escape that attribute before version 3.4.1, enabling stored XSS from content authored by Contributor+ users.
Likely exposure
Exposure is limited to WordPress sites running Yada Wiki versions before 3.4.1, especially where Contributor or higher accounts can create or edit wiki shortcode content.
Exploitation context
The source bundle does not show CISA KEV listing, active exploitation, public exploit status, or CVSS scoring. Treat exploit evidence as unconfirmed from the provided sources.
Researcher notes
Evidence is concise but consistent: Yada Wiki before 3.4.1 failed to handle the shortcode anchor attribute safely. No CVSS vector, exploit confirmation, or detailed vendor advisory is included in the bundle.
Mitigation direction
- Confirm whether Yada Wiki is installed on any WordPress site.
- Update Yada Wiki to 3.4.1 or later if an older version is present.
- Review vendor or WPScan guidance for any additional remediation notes.
- Restrict Contributor+ access until affected sites are remediated.
Validation and detection
- Inventory WordPress plugins and record the Yada Wiki version.
- Check for Yada Wiki versions below 3.4.1.
- Review Contributor, Author, Editor, and Administrator accounts for unnecessary access.
- Audit wiki content using shortcode anchor attributes for suspicious stored content.
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-2021-24470 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/b01a85cc-0e45-4183-a916-19476354d5d4CVE 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 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.