ConvertPlus <= 3.6.3 - Authenticated (Subscriber+) PHP Object Injection via 'style' Parameter
The ConvertPlus plugin for WordPress is vulnerable to Deserialization of Untrusted Data in all versions up to, and including, 3.6.3 via the style parameter of the cp_display_preview_modal AJAX action. The vulnerability exists because the action's nonce guard is gated behind an isset() check and fails open when the cp_admin_page_nonce parameter is omitted entirely, no capability check is performed on the callback, and sanitize_text_field() — applied to the $style value before it is concatenated directly into a shortcode string evaluated by do_shortcode() — does not strip shortcode delimiters, allowing an attacker to inject a second, fully attacker-controlled [smile_modal] invocation that causes smile_modal_popup() to pass attacker-supplied base64-decoded bytes to maybe_unserialize() with no allowed_classes restriction. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject a PHP object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
Betroffene Software
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| Plattform | Paket | Anfällige Versionen | Behoben in |
|---|---|---|---|
| WordPress-Plugin | ConvertPlus | <= 3.6.3 | 3.6.4 |
Verweise
- CVSS-Vektor
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Schwäche (CWE)
CWE-78- Plattform
- WordPress
- Paket
ConvertPlus- Veröffentlicht
- 28.09.2026
- Aktualisiert
- 11.10.2026 10:22
Quellen und Lizenzen
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Schwachstellenhistorie: ConvertPlus
Alle veröffentlichten Schwachstellen dieses Pakets (WordPress-Plugin), neueste zuerst. Zeigt, ob es ein einmaliger Ausrutscher ist oder ein Paket, das man im Auge behalten muss.
- Einträge insgesamt
- 7
- Erste → letzte
- 05.2019 09.2026
- Ohne Fix
- 0
- In Angriffen ausgenutzt
- 0
Verteilung nach Schweregrad
- Kritisch 1
- Hoch 5
- Mittel 1
Veröffentlichungen pro Jahr
- 2019: 2
- 2020: 0
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 3
- 2025: 1
- 2026: 1
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ConvertPlus <= 3.6.3 - Authenticated (Subscriber+) PHP Object Injection via 'style' Parameter dieser Eintrag
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