EUVD-2026-24650
GHSA-f34c-54gc-hh3w
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
4DescriptionCVE.org
The Easy Social Photos Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'wrapper_class' shortcode attribute of the 'my-instagram-feed' shortcode in all versions up to, and including, 3.1.2. This is due to insufficient input sanitization and output escaping on user supplied attributes. Specifically, the plugin uses sanitize_text_field() instead of esc_attr() when outputting the 'wrapper_class' attribute inside a double-quoted HTML class attribute. Since sanitize_text_field() does not encode double quotes, an attacker can break out of the class attribute and inject arbitrary HTML event handlers. 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.
AnalysisAI
Stored cross-site scripting (XSS) in Easy Social Photos Gallery - MIF plugin for WordPress (versions up to 3.1.2) allows authenticated attackers with contributor-level access to inject arbitrary HTML and JavaScript via the 'wrapper_class' shortcode attribute of the 'my-instagram-feed' shortcode. The vulnerability exists because the plugin uses sanitize_text_field() instead of esc_attr() when outputting the attribute inside HTML class tags, allowing attackers to break out of the attribute context and inject event handlers that execute in users' browsers when they visit affected pages.
Technical ContextAI
The Easy Social Photos Gallery plugin processes WordPress shortcodes, specifically 'my-instagram-feed', which accept user-supplied attributes including 'wrapper_class'. The vulnerable code path involves the frontend rendering class (class-my-instagram-feed-frontend.php) and feed view template (feed.php), which concatenate the 'wrapper_class' attribute directly into HTML class declarations. The root cause is inadequate output encoding: sanitize_text_field() is a function designed to clean text content but does NOT encode special characters like double quotes (') that are meaningful in HTML attribute context. In contrast, esc_attr() is specifically designed to escape attribute values by encoding characters like quotes, ampersands, and brackets. When user input containing a double quote (e.g., '" onclick="alert(1)"') is processed by sanitize_text_field(), the quote character passes through unencoded, allowing the attacker to terminate the class attribute and inject arbitrary HTML attributes. This is categorized as CWE-79 (Improper Neutralization of Input During Web Page Generation), a classic XSS vulnerability class.
RemediationAI
Upgrade Easy Social Photos Gallery - MIF plugin to version 3.1.3 or later immediately. The patch corrects the vulnerable output encoding by replacing sanitize_text_field() with esc_attr() in the 'wrapper_class' attribute rendering logic (class-my-instagram-feed-frontend.php line 53 and feed.php line 102). If immediate patching is not feasible, implement the following compensating controls: (1) restrict WordPress contributor role assignment to trusted internal staff only; audit and revoke unnecessary contributor accounts, reducing the pool of potential attackers - this has trade-off of limiting legitimate contributors; (2) disable the 'my-instagram-feed' shortcode site-wide by removing or deactivating the plugin if the feed functionality is not essential - this eliminates attack surface but removes feature functionality; (3) enable a WordPress security plugin (e.g., Wordfence, Sucuri) with shortcode content scanning to detect and block injected event handlers in shortcode attributes - this provides detection but not prevention. Verify the patched version is installed by checking Plugins > Installed Plugins dashboard or via wp-cli: 'wp plugin list | grep my-instagram-feed'. Consult Wordfence vulnerability advisory (https://www.wordfence.com/threat-intel/vulnerabilities/id/8640724c-0bd4-4684-9fd1-027f2af64e67) for additional details.
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