CVE Catalog

CVE-2026-15098

MediumCVSS 6.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.19%

9th percentile - higher than 9% of all known CVEs

Summary

The Real3D Flipbook Lite plugin for WordPress in versions up to and including 5.1.1 is vulnerable to Stored Cross-Site Scripting via the 'lightboxtext' shortcode attribute and other unsanitized attributes handled by on_shortcode(). Attribute values are copied verbatim into flipbook options and emitted via wp_json_encode() inside a <script type="application/json"> block without the JSON_HEX_TAG flag, allowing a literal </script> sequence to break out of the JSON script context.

Risk Assessment

An authenticated attacker with Contributor-level access or above can inject arbitrary web scripts into pages that execute whenever a user (typically an Editor or Administrator previewing or moderating the pending post) accesses the injected page, potentially leading to account takeover.

Recommendation

Update the Real3D Flipbook Lite plugin to a version newer than 5.1.1 once available, and restrict Contributor roles on the site to the necessary minimum.

Related vulnerabilities

Original NVD description (English source)

The Real3D Flipbook Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'lightboxtext' shortcode attribute (and other unsanitized attributes handled by on_shortcode()) in versions up to, and including, 5.1.1. This is due to insufficient input sanitization and output escaping in the on_shortcode() and print_global_options() functions: shortcode attribute values are copied verbatim into $this->flipbook_options and then emitted via wp_json_encode() inside a <script type="application/json"> block without the JSON_HEX_TAG flag, allowing a literal </script> byte sequence in the attribute value to break out of the JSON script context. Because WordPress's shortcode_parse_atts() applies stripcslashes() to attribute values, an attacker can encode the breakout tag as \x3c/script\x3e\x3cscript\x3e…\x3c/script\x3e, which survives the wp_kses_post save-time filter applied to Contributor content (the escape bytes are safe text characters, not HTML tags) and is decoded to real angle brackets at render time. 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 (typically an Editor or Administrator previewing/moderating the pending post) accesses an injected page.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS