CVE-2026-5357: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in codename065 Download Manager
The Download Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sid' parameter of the 'wpdm_members' shortcode in versions up to and including 3.3.52. This is due to insufficient input sanitization and output escaping on the user-supplied 'sid' shortcode attribute. The sid parameter is extracted without sanitization in the members() function and stored via update_post_meta(), then echoed directly into an HTML id attribute in the members.php template without applying 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 the injected page.
AI Analysis
Technical Summary
The Download Manager plugin for WordPress improperly handles the 'sid' parameter of the 'wpdm_members' shortcode by failing to sanitize input before storing it via update_post_meta() and by not escaping output in the members.php template. This leads to stored cross-site scripting (CWE-79), enabling authenticated users with contributor-level permissions or higher to inject arbitrary scripts that execute in the context of users visiting the affected pages. The vulnerability affects versions up to 3.3.52 and has a CVSS 3.1 base score of 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N). No known exploits are reported in the wild, and no vendor patch or official fix has been documented.
Potential Impact
An attacker with contributor-level or higher privileges can exploit this vulnerability to inject persistent malicious scripts into pages generated by the Download Manager plugin. These scripts execute in the browsers of users who visit the infected pages, potentially leading to theft of user credentials, session hijacking, or other client-side attacks. The vulnerability impacts confidentiality and integrity but does not affect availability. The scope is changed (S:C) because the vulnerability affects resources beyond the attacker’s privileges.
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 disabling or removing the Download Manager plugin if possible. Monitor for plugin updates from codename065 and apply them promptly once released.
CVE-2026-5357: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in codename065 Download Manager
Description
The Download Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sid' parameter of the 'wpdm_members' shortcode in versions up to and including 3.3.52. This is due to insufficient input sanitization and output escaping on the user-supplied 'sid' shortcode attribute. The sid parameter is extracted without sanitization in the members() function and stored via update_post_meta(), then echoed directly into an HTML id attribute in the members.php template without applying 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 the injected page.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Download Manager plugin for WordPress improperly handles the 'sid' parameter of the 'wpdm_members' shortcode by failing to sanitize input before storing it via update_post_meta() and by not escaping output in the members.php template. This leads to stored cross-site scripting (CWE-79), enabling authenticated users with contributor-level permissions or higher to inject arbitrary scripts that execute in the context of users visiting the affected pages. The vulnerability affects versions up to 3.3.52 and has a CVSS 3.1 base score of 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N). No known exploits are reported in the wild, and no vendor patch or official fix has been documented.
Potential Impact
An attacker with contributor-level or higher privileges can exploit this vulnerability to inject persistent malicious scripts into pages generated by the Download Manager plugin. These scripts execute in the browsers of users who visit the infected pages, potentially leading to theft of user credentials, session hijacking, or other client-side attacks. The vulnerability impacts confidentiality and integrity but does not affect availability. The scope is changed (S:C) because the vulnerability affects resources beyond the attacker’s privileges.
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 disabling or removing the Download Manager plugin if possible. Monitor for plugin updates from codename065 and apply them promptly once released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-04-01T17:01:10.398Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d71b0f1cc7ad14da048cf3
Added to database: 4/9/2026, 3:20:47 AM
Last enriched: 4/9/2026, 3:36:11 AM
Last updated: 4/10/2026, 5:43:28 AM
Views: 12
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