Security readout for executives and security teams
Plain-English summary
This vulnerability affects The Plus Addons for Elementor Page Builder on WordPress before 4.1.12. Improper sanitization in an AJAX action can let an attacker reflect malicious script into a victim’s browser. Business risk is mainly account compromise, session theft, malicious redirects, or content manipulation if users can be tricked into opening a crafted link.
Executive priority
Treat this as a targeted WordPress plugin cleanup item, not a confirmed emergency. Prioritize externally reachable sites, administrator-heavy workflows, and sites handling customer sessions. Upgrade validation should be scheduled promptly because reflected XSS can affect trust, administrator accounts, and site integrity even without evidence of active exploitation.
Technical view
CVE-2021-24351 is a reflected XSS issue in the theplus_more_post AJAX action. The plugin failed to sanitize some fields before version 4.1.12. The source states it is exploitable against both unauthenticated and authenticated users. CWE-79 applies. No CVSS vector, exploit code, or active exploitation evidence is included in the provided bundle.
Likely exposure
Exposure is limited to WordPress sites running The Plus Addons for Elementor Page Builder before 4.1.12. Public sites are more exposed because reflected XSS can target visitors or administrators through crafted interactions. Sites not using this plugin, or already on 4.1.12 or later, are not indicated as affected by the supplied sources.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The vulnerability is reflected XSS, so practical exploitation generally depends on causing a victim to load attacker-controlled input. The bundle confirms unauthenticated and authenticated exploitability, but does not provide observed exploitation, exploit maturity, or real-world campaign evidence.
Researcher notes
The strongest source detail is WPScan/CVE wording: improper sanitization in the theplus_more_post AJAX action before 4.1.12. The affected vendor is not clearly identified in the bundle. Severity, CVSS, patch diff, and exploit status are incomplete, so avoid claims beyond reflected XSS and the version boundary.
Mitigation direction
- Upgrade The Plus Addons for Elementor Page Builder to 4.1.12 or later.
- Confirm vendor changelog and current plugin guidance before production rollout.
- Remove or disable the plugin if it cannot be updated promptly.
- Prioritize administrator-facing WordPress sites and high-traffic public sites.
- Review security controls that reduce reflected XSS impact, such as hardened admin sessions.
Validation and detection
- Inventory WordPress sites using The Plus Addons for Elementor Page Builder.
- Confirm installed plugin versions are 4.1.12 or later.
- Check whether vulnerable versions are present on public-facing sites.
- Review logs for unusual requests involving the theplus_more_post AJAX action.
- Document compensating controls where immediate upgrade is delayed.
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-2021-24351 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/2ee62f85-7aea-4b7d-8b2d-5d86d9fb8016CVE reference · x_refsource_CONFIRM
- https://theplusaddons.com/changelog/CVE 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.