Security readout for executives and security teams
Plain-English summary
CVE-2025-23439 is a reflected cross-site scripting issue in the WordPress TinyMCE Extended Config plugin through version 0.1.0. An attacker would need a user to interact with a crafted request. Successful abuse could run script in the user’s browser and affect confidentiality, integrity, and availability at a limited level.
Executive priority
Treat this as a high-priority WordPress plugin exposure where the plugin is present, especially on public business sites. It is not currently supported by provided evidence as mass exploited, but XSS can enable account abuse when privileged users are targeted.
Technical view
The vulnerability is CWE-79 improper input neutralization during web page generation. The CVSS 3.1 score is 7.1 with network attack vector, low complexity, no privileges required, required user interaction, and changed scope. The source bundle identifies willshouse TinyMCE Extended Config package tinymce-extended-config through <=0.1.0 as affected.
Likely exposure
Exposure is likely limited to WordPress sites that have the TinyMCE Extended Config plugin installed at version 0.1.0 or earlier. Sites not using this plugin are not indicated as affected by the provided sources.
Exploitation context
The CVE is not listed as KEV in the source bundle, and no cited source here confirms active exploitation. The CVSS vector indicates exploitation requires user interaction, consistent with reflected XSS risk such as tricking a site user into opening a crafted link.
Researcher notes
Evidence is limited to the CVE record, CVE List data, and Patchstack reference. The bundle does not name a fixed version or vendor mitigation. Avoid claiming exploitation in the wild unless new KEV or vendor intelligence confirms it.
Mitigation direction
- Inventory WordPress sites for the tinymce-extended-config plugin and version.
- Check vendor, WordPress plugin, CVE, and Patchstack guidance for a fixed release.
- Disable or remove the plugin if it is not business-critical.
- Prioritize remediation for sites with administrator access exposed to untrusted links.
- Review compensating browser and WordPress hardening, but do not treat them as a fix.
Validation and detection
- Confirm whether TinyMCE Extended Config is installed on each WordPress site.
- Record installed plugin versions and flag <=0.1.0 as affected.
- Review access logs only for indicators relevant to suspicious plugin-related requests.
- Verify remediation by confirming the plugin is removed, disabled, or updated per vendor guidance.
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-2025-23439 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
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.