Security readout for executives and security teams
Plain-English summary
This affects WordPress sites using Alexander Suess's asMember plugin at version 1.5.4 or earlier. An authenticated administrator-level user could store malicious script content that runs when another user views it. The main business risk is account misuse, site-content tampering, or session exposure inside WordPress admin workflows.
Executive priority
Treat as a moderate-priority WordPress plugin issue. It is not cited as actively exploited and requires admin privileges, but affected sites should be inventoried and remediated because stored XSS can amplify compromised-admin scenarios.
Technical view
CVE-2023-26541 is an authenticated stored XSS issue in the WordPress asMember plugin <= 1.5.4. The CVSS 3.1 score is 5.9, with network access, low complexity, high privileges, required user interaction, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress installations running the asMember plugin version 1.5.4 or earlier. Risk is lower than unauthenticated XSS because admin-level access is required, but compromised or malicious admin accounts can still create downstream browser-session impact.
Exploitation context
The source bundle does not show CISA KEV listing or other cited evidence of active exploitation. Exploitation requires authenticated administrator-level privileges and user interaction, which narrows but does not eliminate practical risk in shared-admin or compromised-account scenarios.
Researcher notes
Provided evidence identifies CWE-79 stored XSS, admin+ authentication, affected version <= 1.5.4, and CVSS 5.9. The bundle does not provide exploit details, a named fixed version, or proof of exploitation in the wild.
Mitigation direction
- Inventory WordPress sites for the asMember plugin and installed version.
- Check vendor or Patchstack guidance for a confirmed fixed version or mitigation.
- Update the plugin if a vendor-supported fixed release is available.
- Disable or remove asMember where it is not business-critical.
- Restrict administrator access and review unnecessary privileged accounts.
Validation and detection
- Confirm whether any WordPress site runs asMember 1.5.4 or earlier.
- Review plugin inventory from WordPress admin or asset management records.
- Check whether the plugin is still maintained and supported.
- Review administrator accounts for stale, shared, or weakly governed access.
- Look for unexpected script-like content in relevant plugin-managed fields.
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-2023-26541 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
- Medium
- CVSS
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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.
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:H/UI:R/S:C/C:L/I:L/A:L1.73.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
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.