CVE-2026-2951 | Gutentor Plugin up to 3.5.5 on WordPress Gutenberg Block cross site scripting

VDB-359095 · CVE-2026-2951 · GCVE-0-2026-2951 GUTENTOR PLUGIN UP TO 3.5.5 ON WORDPRESS GUTENBERG BLOCK CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.4 $0-$5k 1.18+ Summaryinfo A vulnerability identified as problematic has been detected in Gutentor Plugin up to 3.5.5 on WordPress. Affected by this vulnerability is an unknown functionality of the component Gutenberg Block Handler. This manipulation causes cross site scripting. This vulnerability is registered as CVE-2026-2951. Remote exploitation of the attack is possible. No exploit is available. Detailsinfo A vulnerability has been found in Gutentor Plugin up to 3.5.5 on WordPress and classified as problematic. Affected by this vulnerability is some unknown functionality of the component Gutenberg Block Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is: The Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 3.5.5 due to insufficient input sanitization and output escaping. 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. The weakness was published by Muhammad Yudha. It is possible to read the advisory at wordfence.com. This vulnerability is known as CVE-2026-2951 since 02/21/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK. 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 Name Gutentor Plugin Version 3.5.0 3.5.1 3.5.2 3.5.3 3.5.4 3.5.5 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.4 VulDB Meta Temp Score: 4.4 VulDB Base Score: 3.5 VulDB Temp Score: 3.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.4 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 02/21/2026 CVE reserved 04/23/2026 +60 days Advisory disclosed 04/23/2026 +0 days VulDB entry created 04/23/2026 +0 days VulDB entry last update Sourcesinfo Advisory: wordfence.com Researcher: Muhammad Yudha Status: Not defined CVE: CVE-2026-2951 (🔒) GCVE (CVE): GCVE-0-2026-2951 GCVE (VulDB): GCVE-100-359095 Entryinfo Created: 04/23/2026 07:10 Changes: 04/23/2026 07:10 (64) Complete: 🔍 Cache ID: 99:4C0:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸