CVE-2023-45658
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedMissing Authorization vulnerability in POSIMYTH Nexter.This issue affects Nexter: from n/a through 2.0.3.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceMissing Authorization vulnerability in POSIMYTH Nexter (WordPress theme) through version 2.0.3. The plugin/theme lacks proper capability checks on certain functions, allowing unauthenticated or lower-privileged users to perform actions that should require higher privileges (e.g., admin-level operations).
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- High
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm Nexter theme is installedIn WordPress admin, go to Appearance > Themes and check if the Nexter theme is active. Alternatively, check the wp-content/themes/nexter directory exists on the server.Affected if Nexter theme is installed and active
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Identify the installed Nexter versionCheck the style.css file in wp-content/themes/nexter/ for the 'Version:' header, or look in WordPress admin under Appearance > Themes > Nexter Theme details.Affected if Version is 2.0.3 or lower (any version through 2.0.3)
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Inspect AJAX endpoints for capability checksExamine PHP files in the theme for AJAX action handlers (add_action with 'wp_ajax_' or 'wp_ajax_nopriv_' hooks). Search for functions that perform admin-level operations without current_user_can() capability checks.Affected if AJAX endpoints allow actions without proper capability verification or nonce validation
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Check admin-related functions for authorizationReview PHP files handling settings, updates, or configuration (often in functions.php, classes, or ajax handlers). Look for functions that modify site settings, user data, or theme options without checking user privileges.Affected if Admin functions can be triggered by unauthenticated or low-privilege users (e.g., subscribers, guests)
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Verify exposure of sensitive functionsTest or inspect whether public-facing endpoints (AJAX, REST, or direct PHP includes) expose functions for creating/modifying users, changing settings, or accessing sensitive data without authentication.Affected if Sensitive operations are accessible without login or proper role verification
A user is affected if the Nexter theme version is 2.0.3 or lower AND the theme exposes admin-level functions without capability checks accessible to unauthenticated or low-privileged users.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate to the latest version of Nexter theme (2.0.4+). If update unavailable, audit all AJAX endpoints and admin-related functions for proper capability checks using current_user_can() and nonces, and restrict access to registered, authenticated users only.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-45658 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-45658 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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