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Cross-site Scripting (XSS)Weakness · CWE-79

CVE-2026-57693

MEDIUM · 6.5 CVSS v3.1 Published 2026-07-13
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
69/100
Remediation priority · Elevated
Remotely reachable 5 weeks old

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 · unedited
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Spacetime Ad Inserter ad-inserter allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Ad Inserter: from n/a through <= 2.8.11.

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 · moderate confidence

Cross-site scripting (XSS) vulnerability in the Ad Inserter WordPress plugin allows injection of malicious scripts through improper input neutralization during web page generation. The vulnerability exists in versions up to and including 2.8.11, allowing attackers to execute arbitrary JavaScript in the context of a user's browser session.

MitigationUpdate to the latest version of Ad Inserter when available; apply proper output encoding and input validation to all user-supplied data before rendering in pages.

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
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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 checks

Work through these to decide whether this CVE applies to you.

  1. Locate Ad Inserter plugin installation
    Check the WordPress plugins directory (wp-content/plugins/ad-inserter/) for the plugin files, or list all installed plugins via WordPress admin under Plugins > Installed Plugins
    Affected if Ad Inserter plugin is present in the WordPress installation
  2. Identify installed Ad Inserter version
    Open the main Ad Inserter plugin file (ad-inserter.php) and locate the Version header in the plugin comment block, or check the version in readme.txt
    Affected if The version number displayed is 2.8.11 or lower
  3. Verify active plugin status
    In WordPress admin, navigate to Plugins > Installed Plugins and confirm Ad Inserter shows as Active
    Affected if The plugin is activated and the version is 2.8.11 or lower
  4. Confirm plugin handles output content
    Review Ad Inserter settings (Settings > Ad Inserter) to see if the plugin is configured to insert content into pages/posts
    Affected if The plugin is actively configured to insert ads or content into web pages, as this is where the XSS can trigger during page generation

A WordPress site is affected if Ad Inserter plugin version 2.8.11 or lower is installed and active, and is configured to insert content into pages where user-supplied data could be rendered without proper encoding.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update to the latest version of Ad Inserter when available; apply proper output encoding and input validation to all user-supplied data before rendering in pages.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,750
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-57693 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data