Security readout for executives and security teams
Plain-English summary
CVE-2024-37433 is a reflected cross-site scripting issue in the WordPress Mailster plugin through version 4.0.9. A successful attack could make a victim’s browser run attacker-controlled script in the site’s context. It is rated high severity, but requires user interaction. No provided source indicates active exploitation.
Executive priority
Treat as a priority patch-management item for WordPress estates using Mailster. It is high severity and remotely reachable, but requires user interaction and has no confirmed active exploitation in the provided sources. Focus first on public-facing sites and administrator-heavy environments.
Technical view
The issue is CWE-79 improper input neutralization during web page generation in EverPress Mailster. CVSS 3.1 is 7.1: network reachable, low complexity, no privileges required, user interaction required, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to WordPress sites running the Mailster plugin at version 4.0.9 or earlier. Internet-facing WordPress administration or plugin-generated pages may increase risk. Sites not using Mailster, or using versions outside the affected range, are not indicated as affected by the provided sources.
Exploitation context
This is reflected XSS, so an attacker would generally need to induce a user to visit a crafted URL or request. Impact depends on the victim’s privileges and browser session. The sources do not report CISA KEV listing, known exploitation, public exploit maturity, or a named fixed version.
Researcher notes
Public data identifies the vulnerability class, affected plugin, affected version range, and CVSS vector. The provided sources do not include a technical root cause, vulnerable parameter, proof of concept, exploit status, or explicit fixed version. Avoid assuming broader EverPress or WordPress impact beyond Mailster through 4.0.9.
Mitigation direction
- Inventory WordPress sites for the Mailster plugin and record installed versions.
- Prioritize sites running Mailster 4.0.9 or earlier.
- Check EverPress, WordPress plugin, and Patchstack guidance for a fixed release or workaround.
- Update or disable Mailster where business impact allows, following vendor guidance.
- Use web application protections to reduce reflected XSS exposure where feasible.
Validation and detection
- Confirm whether Mailster is installed on each WordPress site.
- Verify the installed Mailster version is greater than 4.0.9 or otherwise vendor-confirmed safe.
- Review Patchstack and CVE records for updated remediation details.
- Check security logs for unusual requests targeting Mailster-related pages.
- Validate compensating controls without using offensive payloads in production.
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-2024-37433 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
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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.
SSVC decision data
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:L/I:L/A:L2.83.7PatchstackVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://patchstack.com/database/Wordpress/Plugin/mailster/vulnerability/wordpress-mailster-plugin-4-0-9-reflected-cross-site-scripting-xss-vulnerability?_s_id=cveCVE reference, Patchstack · vdb-entry
- https://patchstack.com/database/vulnerability/mailster/wordpress-mailster-plugin-4-0-9-reflected-cross-site-scripting-xss-vulnerability?_s_id=cveCVE reference, CVE · vdb-entry, x_transferred
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.