Security readout for executives and security teams
Plain-English summary
CVE-2023-45658 is a broken access control issue in the POSIMYTH Nexter WordPress theme through version 2.0.3. A logged-in low-privilege user may perform actions they should not be authorized to perform, with high integrity impact.
Executive priority
Treat as a high-priority WordPress exposure if Nexter is deployed, because an authenticated low-privilege account may be enough to alter protected behavior or content. Prioritize internet-facing and user-registration sites first.
Technical view
The source bundle identifies a CWE-862 missing authorization vulnerability in Nexter, package name nexter, affecting versions through 2.0.3. CVSS 3.1 is 7.6: network reachable, low complexity, low privileges required, no user interaction, with limited confidentiality and availability impact and high integrity impact.
Likely exposure
Exposure is mainly WordPress sites using the POSIMYTH Nexter theme at or below 2.0.3, especially sites allowing subscriber, contributor, customer, or other low-privilege logins. The bundle does not identify a specific vulnerable endpoint or function.
Exploitation context
The provided data does not show CISA KEV inclusion or active exploitation. The CVSS vector indicates exploitation would require an authenticated low-privilege account but no user interaction. Do not assume public exploit availability from this bundle alone.
Researcher notes
Evidence is limited to the CVE description, CVSS vector, CWE-862 classification, and Patchstack reference. The bundle does not provide endpoint details, proof-of-concept status, exploit telemetry, or a named fixed version, so validation should stay inventory- and vendor-guidance-driven.
Mitigation direction
- Inventory WordPress sites using the POSIMYTH Nexter theme.
- Identify installations running Nexter version 2.0.3 or older.
- Check POSIMYTH and Patchstack guidance for the fixed version or mitigation.
- Update, remove, or disable affected theme deployments per vendor guidance.
- Review low-privilege user accounts and remove unnecessary access.
- Monitor for unexpected WordPress content, setting, or theme changes.
Validation and detection
- Confirm the installed Nexter theme version on each WordPress site.
- Verify whether any site permits low-privilege user registration or logins.
- Review WordPress activity and server logs for unauthorized administrative changes.
- Check vendor or Patchstack advisories for remediation status and version guidance.
- After remediation, confirm affected deployments no longer run version 2.0.3 or older.
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-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2023-45658 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
- 7.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/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:L/UI:N/S:U/C:L/I:H/A:L2.84.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.6HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.