CVE-2026-5711 | pubudu-malalasekara Post Blocks & Tools Plugin up to 1.3.0 on WordPress cross site scripting

VDB-356485 · CVE-2026-5711 · GCVE-0-2026-5711 PUBUDU-MALALASEKARA POST BLOCKS & TOOLS PLUGIN UP TO 1.3.0 ON WORDPRESS CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.9 $0-$5k 0.53+ Summaryinfo A vulnerability has been found in pubudu-malalasekara Post Blocks & Tools Plugin up to 1.3.0 on WordPress and classified as problematic. This affects an unknown function. This manipulation causes cross site scripting. This vulnerability is registered as CVE-2026-5711. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded. Detailsinfo A vulnerability has been found in pubudu-malalasekara Post Blocks & Tools Plugin up to 1.3.0 on WordPress and classified as problematic. Affected by this vulnerability is an unknown part. 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 Post Blocks & Tools plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sliderStyle' block attribute in the Posts Slider block in all versions up to, and including, 1.3.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with author-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 Athiwat Tiprasaharn. The advisory is shared at wordfence.com. This vulnerability is known as CVE-2026-5711 since 04/06/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue. Upgrading to version 1.3.0 eliminates this vulnerability. Productinfo Type WordPress Plugin Vendor pubudu-malalasekara Name Post Blocks & Tools Plugin Version 1.0 1.1 1.2 1.3.0 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.9 VulDB Meta Temp Score: 4.9 VulDB Base Score: 3.5 VulDB Temp Score: 3.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.4 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: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Post Blocks & Tools Plugin 1.3.0 Timelineinfo 04/06/2026 CVE reserved 04/09/2026 +3 days Advisory disclosed 04/09/2026 +0 days VulDB entry created 04/09/2026 +0 days VulDB entry last update Sourcesinfo Advisory: wordfence.com Researcher: Athiwat Tiprasaharn Status: Confirmed CVE: CVE-2026-5711 (🔒) GCVE (CVE): GCVE-0-2026-5711 GCVE (VulDB): GCVE-100-356485 Entryinfo Created: 04/09/2026 02:47 Changes: 04/09/2026 02:47 (66) Complete: 🔍 Cache ID: 99:4D1:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸