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CVE Record

CVE-2026-3617: Paypal Shortcodes <= 0.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'amount' and 'name' Shortcode Attributes

The Paypal Shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'amount' and 'name' shortcode attributes in all versions up to, and including, 0.3. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. The swer_paypal_shortcode() function extracts shortcode attributes using extract() and shortcode_atts() at line 89, then directly concatenates the $name and $amount values into HTML input element value attributes at lines 105-106 without applying 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.

MediumCVSS 6.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-3617 affects the WordPress Paypal Shortcode plugin through version 0.3. A logged-in user with Contributor-level access or higher could save malicious script in shortcode fields. That script could run when someone views the affected page. Business urgency depends on whether the plugin is installed and whether untrusted users can create content.

Executive priority

Treat this as a targeted WordPress content-security issue, not an internet-wide emergency. Prioritize sites that accept contributor content or support public author accounts. If the plugin is unused, removal is the fastest risk reduction.

Technical view

The issue is stored cross-site scripting in shortcode attributes 'amount' and 'name'. The vulnerable function extracts shortcode attributes, then concatenates those values into HTML input value attributes without proper output escaping. CVSS is 6.4, with low privileges required and changed scope. CWE-79 applies.

Likely exposure

Exposure is limited to WordPress sites using Paypal Shortcode plugin versions up to and including 0.3. The attacker must already have Contributor-level or higher access. Sites with many authors, guest contributors, or compromised author accounts face greater practical risk.

Exploitation context

The public sources do not report active exploitation, and the CVE is not listed as KEV in the provided bundle. Exploitation requires authenticated content access and a victim viewing an injected page. Impact is typical stored XSS: session, content, or administrative interaction risk depending on viewer privileges.

Researcher notes

The source bundle identifies lines where shortcode attributes are extracted and later inserted into input value attributes without esc_attr() or equivalent escaping. No fixed version or patch details were provided. Validate against the exact plugin code deployed rather than assuming remediation exists.

Mitigation direction

  • Inventory WordPress sites for the Paypal Shortcode plugin and its version.
  • If affected, review vendor or WordPress plugin guidance for an update or advisory.
  • Restrict Contributor and higher access to trusted users until remediated.
  • Disable or remove the plugin where it is not business-critical.
  • Review existing shortcode usage for suspicious 'amount' or 'name' values.

Validation and detection

  • Confirm whether paypal-shortcodes is installed on each WordPress site.
  • Check whether the installed version is 0.3 or earlier.
  • Review pages and posts containing the plugin shortcode attributes.
  • Verify whether shortcode output escapes HTML attribute values after any update.
  • Check WordPress audit logs for recent content changes by Contributor-level users.
Prepared
Confidence
high
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-3617 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.4CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N3.12.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.4Medium
CVSS 3.1 vector shape for CVE-2026-3617Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
swergroupPaypal Shortcodes0unaffected
Weakness

CWE details

CWE-79

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-79 · source CWE mapping

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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