CVE-2026-6486 | classroombookings up to 2.17.0 User Display Name layout.php read displayname cross site scripting

VDB-358027 · CVE-2026-6486 · GCVE-100-358027 CLASSROOMBOOKINGS UP TO 2.17.0 USER DISPLAY NAME LAYOUT.PHP READ DISPLAYNAME CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.2 $0-$5k 1.26+ Summaryinfo A vulnerability was found in classroombookings up to 2.17.0. It has been classified as problematic. Affected is the function read of the file crbs-core/application/views/layout.php of the component User Display Name Handler. This manipulation of the argument displayname causes cross site scripting. This vulnerability is tracked as CVE-2026-6486. The attack is possible to be carried out remotely. Moreover, an exploit is present. Upgrading the affected component is recommended. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product. Detailsinfo A vulnerability was found in classroombookings up to 2.17.0. It has been declared as problematic. Affected by this vulnerability is the function read of the file crbs-core/application/views/layout.php of the component User Display Name Handler. The manipulation of the argument displayname 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. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-6486. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK. It is possible to download the exploit at github.com. It is declared as proof-of-concept. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product. By approaching the search of inurl:crbs-core/application/views/layout.php it is possible to find vulnerable targets with Google Hacking. Upgrading to version 2.17.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 69c3c9bb8a17f1ea572d8f4502bf238f0214c98a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. Productinfo Name classroombookings Version 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17.0 License open-source Website Product: https://github.com/classroombookings/classroombookings/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 3.5 VulDB Meta Temp Score: 3.2 VulDB Base Score: 3.5 VulDB Temp Score: 3.2 VulDB Vector: 🔒 VulDB Reliability: 🔍 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: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 Google Hack: 🔒 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: classroombookings 2.17.1 Patch: 69c3c9bb8a17f1ea572d8f4502bf238f0214c98a Timelineinfo 04/17/2026 Advisory disclosed 04/17/2026 +0 days VulDB entry created 04/17/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed Confirmation: 🔒 CVE: CVE-2026-6486 (🔒) GCVE (CVE): GCVE-0-2026-6486 GCVE (VulDB): GCVE-100-358027 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 04/17/2026 09:03 Changes: 04/17/2026 09:03 (63) Complete: 🔍 Submitter: sudosme Cache ID: 99:E17:101 Submitinfo Accepted Submit #786154: Craig A Rodway classroombookings 2.16.4 Stored Cross-Site Scripting (XSS) (by sudosme) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸