CVE-2026-4082: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in erithq ER Swiffy Insert
The ER Swiffy Insert plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the [swiffy] shortcode in all versions up to and including 1.0.0. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes ('n', 'w', 'h'). These attributes are extracted using extract() and directly interpolated into the HTML output without any escaping such as esc_attr(). 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.
AI Analysis
Technical Summary
CVE-2026-4082 is a stored cross-site scripting vulnerability in the ER Swiffy Insert plugin for WordPress. The flaw arises from insufficient input sanitization and output escaping of user-supplied shortcode attributes ('n', 'w', 'h') used in the [swiffy] shortcode. These attributes are extracted and directly interpolated into HTML output without escaping functions such as esc_attr(), enabling authenticated users with Contributor or higher privileges to inject arbitrary JavaScript code. This vulnerability affects all versions up to and including 1.0.0. The CVSS 3.1 base score is 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N), reflecting network attack vector, low attack complexity, requiring privileges, no user interaction, scope change, and low impact on confidentiality and integrity.
Potential Impact
An attacker with Contributor-level or higher access can inject persistent malicious scripts into pages via shortcode attributes. These scripts execute in the context of users viewing the compromised pages, potentially leading to session hijacking, defacement, or other client-side attacks. The vulnerability does not impact availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level access to trusted users only and consider removing or disabling the ER Swiffy Insert plugin if it is not essential. Monitor for plugin updates from the vendor that address this vulnerability.
CVE-2026-4082: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in erithq ER Swiffy Insert
Description
The ER Swiffy Insert plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the [swiffy] shortcode in all versions up to and including 1.0.0. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes ('n', 'w', 'h'). These attributes are extracted using extract() and directly interpolated into the HTML output without any escaping such as esc_attr(). 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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-4082 is a stored cross-site scripting vulnerability in the ER Swiffy Insert plugin for WordPress. The flaw arises from insufficient input sanitization and output escaping of user-supplied shortcode attributes ('n', 'w', 'h') used in the [swiffy] shortcode. These attributes are extracted and directly interpolated into HTML output without escaping functions such as esc_attr(), enabling authenticated users with Contributor or higher privileges to inject arbitrary JavaScript code. This vulnerability affects all versions up to and including 1.0.0. The CVSS 3.1 base score is 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N), reflecting network attack vector, low attack complexity, requiring privileges, no user interaction, scope change, and low impact on confidentiality and integrity.
Potential Impact
An attacker with Contributor-level or higher access can inject persistent malicious scripts into pages via shortcode attributes. These scripts execute in the context of users viewing the compromised pages, potentially leading to session hijacking, defacement, or other client-side attacks. The vulnerability does not impact availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level access to trusted users only and consider removing or disabling the ER Swiffy Insert plugin if it is not essential. Monitor for plugin updates from the vendor that address this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-03-12T20:46:40.814Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e8876c19fe3cd2cd808ce2
Added to database: 4/22/2026, 8:31:40 AM
Last enriched: 4/22/2026, 9:02:01 AM
Last updated: 4/23/2026, 12:18:24 AM
Views: 7
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