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

CVE-2026-39517

MEDIUM · 6.5 CVSS v3.1 Published 2026-04-08
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

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 A WP Life Blog Filter blog-filter allows DOM-Based XSS.This issue affects Blog Filter: from n/a through <= 1.7.6.

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

DOM-based Cross-site Scripting (XSS) vulnerability in the A WP Life Blog Filter plugin (blog-filter) allows remote attackers to inject malicious JavaScript code through the filter functionality. The vulnerability stems from improper sanitization of user-supplied input before it is reflected in the HTML/DOM, enabling script execution in victim browsers.

MitigationUpdate the Blog Filter plugin to the latest version if a patch is available. If no patch exists, disable or remove the plugin and implement output encoding/sanitization on any custom filter implementations.

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. Verify Blog Filter plugin is installed
    Navigate to WordPress admin > Plugins, or use WP-CLI: wp plugin list --name=blog-filter. Alternatively, check if /wp-content/plugins/blog-filter/ directory exists.
    Affected if Plugin directory or listing is found in the WordPress installation
  2. Confirm the installed version
    In WordPress admin > Plugins, click on the Blog Filter plugin to view details. Or inspect /wp-content/plugins/blog-filter/readme.txt for the Version field, or check the plugin header in the main PHP file.
    Affected if Version displayed is 1.7.6 or lower (any version through 1.7.6)
  3. Verify plugin is active
    In WordPress admin > Plugins > Installed Plugins, confirm Blog Filter shows as 'Active'. Or run: wp plugin is-active blog-filter
    Affected if Plugin status is Active (inactive plugins cannot be exploited)
  4. Identify exposed endpoints (optional)
    If the plugin provides shortcodes or filter functionality exposed on the frontend (e.g., pages with blog filtering), inspect page source or check for blog-filter related URL parameters as documented by the plugin.
    Affected if Frontend pages use blog-filter functionality that reflects user-supplied input into the page DOM

You are affected if the Blog Filter plugin is installed, active, and the installed version is 1.7.6 or any lower version number.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update the Blog Filter plugin to the latest version if a patch is available. If no patch exists, disable or remove the plugin and implement output encoding/sanitization on any custom filter implementations.

Recommended fix Moderate confidence

Any version higher than 1.7.6 (check WordPress Plugin Repository for latest release)

  1. Log in to the WordPress admin dashboard
  2. Navigate to Plugins > Installed Plugins
  3. Locate the 'Blog Filter' plugin
  4. Check if the currently installed version is 1.7.6 or lower
  5. If vulnerable, click 'Update Now' to install the latest available version
  6. Alternatively, manually download the latest version from the WordPress Plugin Repository and upload via Plugins > Add New > Upload Plugin
  7. After update, verify the new version number in the plugins list
  8. Clear any site caches if caching plugins are in use

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,930
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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-2026-39517 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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