CVE-2026-8893
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 Express Payment For Stripe plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'type' attribute of the [stripe-express] shortcode in versions up to, and including, 1.28.0. This is due to insufficient input sanitization and output escaping on the shortcode attribute value, which is concatenated into an HTML attribute in the rendered output of the register_shortcode() function without being passed through esc_attr() or any other escaping function. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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 confidenceThe Express Payment For Stripe WordPress plugin fails to sanitize and escape the 'type' attribute in its [stripe-express] shortcode. An authenticated attacker with contributor-level access can inject malicious JavaScript into the shortcode attribute, which gets rendered directly into an HTML attribute without escaping, causing stored XSS to execute in browsers of users visiting affected 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
- None
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 plugin installation and versionIn WordPress admin, go to Plugins > Instored Plugins and find 'Express Payment For Stripe' or check the plugin header file for the Version fieldAffected if Plugin version is 1.28.0 or lower (versions beyond 1.28.0 contain the fix)
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Locate shortcode usageSearch the WordPress database or use a plugin to find all posts, pages, and widgets containing '[stripe-express]'Affected if The shortcode is present on the site
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Inspect the type attributeExamine each [stripe-express] shortcode occurrence and check if the 'type' attribute is present, for example: [stripe-express type="value"]Affected if The shortcode includes a 'type' attribute
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Verify output escapingView the page source of a post containing the shortcode with a 'type' attribute; check if the attribute value is wrapped in quotes and properly escaped (look for " or escaped characters) or if it appears raw in the HTMLAffected if The 'type' attribute value appears unescaped in the HTML source (visible as raw quotes or unencoded characters)
You are affected if the Express Payment For Stripe plugin is version 1.28.0 or lower AND the [stripe-express] shortcode with a 'type' attribute is used on any published content.
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 plugin to a version beyond 1.28.0 that properly escapes shortcode attributes using esc_attr() or implement immediate manual patching by adding proper escaping to the shortcode output in the register_shortcode() function.
- 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-2026-8893 — 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-2026-8893 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
- No spam, self-promotion, credentials, or personal data