Subscribe SidebarWordPress extension · Blubrry
CVE-2020-25033
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 · uneditedThe Blubrry subscribe-sidebar (aka Subscribe Sidebar) plugin 1.3.1 for WordPress allows subscribe_sidebar.php&status= reflected XSS.
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 confidenceThe Subscribe Sidebar plugin version 1.3.1 for WordPress contains a reflected cross-site scripting (XSS) vulnerability in the subscribe_sidebar.php file. The 'status' parameter is not properly sanitized before being reflected back in the web application's response, allowing an attacker to inject malicious JavaScript code that executes in the victim's browser.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Subscribe SidebarWordPress extension
= 1.3.1CVSS 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
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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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Verify the Blubrry Subscribe Sidebar plugin is installedCheck for the presence of the subscribe-sidebar or blubrry-subscribe-sidebar directory in wp-content/plugins/Affected if The plugin directory exists in the WordPress plugins folder
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Determine the installed plugin versionOpen the main plugin PHP file (usually subscribe_sidebar.php) and locate the version header comment, or check the plugin's readme.txt fileAffected if The version listed is 1.3.1 exactly
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Confirm the vulnerable subscribe_sidebar.php file existsLocate subscribe_sidebar.php within the plugin directoryAffected if The file exists in the plugin folder, indicating the vulnerable code is present
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Inspect the status parameter handlingExamine the subscribe_sidebar.php file and search for code that handles the 'status' GET or POST parameter, looking for instances where it is output without sanitization functions such as esc_html(), esc_attr(), or esc_url()Affected if The 'status' parameter is echoed or printed directly to the page output without proper escaping functions
You are affected if the Blubrry Subscribe Sidebar plugin version 1.3.1 is installed and the 'status' parameter in subscribe_sidebar.php is being reflected without sanitization.
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 the Blubrry Subscribe Sidebar plugin to the latest patched version available in the WordPress plugin repository. If an update is unavailable, implement output escaping on the status parameter in subscribe_sidebar.php and consider temporarily disabling the plugin until a fix is released.
Fix this in Subscribe Sidebar
Scoped from the published advisory
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-25033 — 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-2020-25033 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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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.
- 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