CVE-2026-3876 | specialk Prismatic Plugin up to 3.7.3 on WordPress Shortcode prismatic_decode cross site scripting

VDB-357896 · CVE-2026-3876 · GCVE-0-2026-3876 SPECIALK PRISMATIC PLUGIN UP TO 3.7.3 ON WORDPRESS SHORTCODE PRISMATIC_DECODE CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.7 $0-$5k 0.79+ Summaryinfo A vulnerability classified as problematic was found in specialk Prismatic Plugin up to 3.7.3 on WordPress. Affected by this vulnerability is the function prismatic_decode of the component Shortcode Handler. Such manipulation leads to cross site scripting. This vulnerability is documented as CVE-2026-3876. The attack can be executed remotely. There is not any exploit available. Detailsinfo A vulnerability, which was classified as problematic, has been found in specialk Prismatic Plugin up to 3.7.3 on WordPress. Affected by this issue is the function prismatic_decode of the component Shortcode Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes: The Prismatic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'prismatic_encoded' pseudo-shortcode in all versions up to, and including, 3.7.3. This is due to insufficient input sanitization and output escaping on user-supplied attributes within the 'prismatic_decode' function. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page by submitting a comment containing a crafted 'prismatic_encoded' pseudo-shortcode. The weakness was released by Athiwat Tiprasaharn. The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-3876 since 03/10/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type WordPress Plugin Vendor specialk Name Prismatic Plugin Version 3.7.0 3.7.1 3.7.2 3.7.3 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.7 VulDB Meta Temp Score: 5.7 VulDB Base Score: 4.3 VulDB Temp Score: 4.2 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.2 CNA Vector (Wordfence): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Cross site scripting CWE: CWE-79 / CWE-94 / CWE-74 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/10/2026 CVE reserved 04/16/2026 +36 days Advisory disclosed 04/16/2026 +0 days VulDB entry created 04/16/2026 +0 days VulDB entry last update Sourcesinfo Advisory: wordfence.com Researcher: Athiwat Tiprasaharn Status: Not defined CVE: CVE-2026-3876 (🔒) GCVE (CVE): GCVE-0-2026-3876 GCVE (VulDB): GCVE-100-357896 Entryinfo Created: 04/16/2026 09:16 Changes: 04/16/2026 09:16 (66) Complete: 🔍 Cache ID: 99:298:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸