CVE-2026-41466 | ProjeQtor up to 12.4.3 Security.php checkValidHtmlText cross site scripting

VDB-359833 · CVE-2026-41466 · GCVE-0-2026-41466 PROJEQTOR UP TO 12.4.3 SECURITY.PHP CHECKVALIDHTMLTEXT CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.4 $0-$5k 0.49+ Summaryinfo A vulnerability was found in ProjeQtor up to 12.4.3. It has been classified as problematic. Affected by this issue is the function checkValidHtmlText of the file Security.php. This manipulation causes cross site scripting. This vulnerability appears as CVE-2026-41466. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended. Detailsinfo A vulnerability has been found in ProjeQtor up to 12.4.3 and classified as problematic. Affected by this vulnerability is the function checkValidHtmlText of the file Security.php. 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: ProjeQtor versions 7.0 through 12.4.3 contain a stored cross-site scripting vulnerability in the checkValidHtmlText() function within Security.php that fails to properly sanitize user input by only detecting specific patterns while returning unsanitized strings without output encoding. Attackers can inject malicious payloads that bypass the filter using alternative syntax such as img tags with event handlers, which are stored and executed in the browsers of users viewing the affected content. The weakness was presented by Yassine Damiri and Noé Susset. The advisory is shared at damiri.fr. This vulnerability is known as CVE-2026-41466 since 04/20/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue. By approaching the search of inurl:Security.php it is possible to find vulnerable targets with Google Hacking. Upgrading to version 12.4.4 eliminates this vulnerability. Productinfo Name ProjeQtor Version 12.4.0 12.4.1 12.4.2 12.4.3 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 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 (VulnCheck): 🔒 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 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: ProjeQtor 12.4.4 Timelineinfo 04/20/2026 CVE reserved 04/27/2026 +7 days Advisory disclosed 04/27/2026 +0 days VulDB entry created 04/27/2026 +0 days VulDB entry last update Sourcesinfo Advisory: damiri.fr Researcher: Yassine Damiri, Noé Susset Status: Confirmed CVE: CVE-2026-41466 (🔒) GCVE (CVE): GCVE-0-2026-41466 GCVE (VulDB): GCVE-100-359833 Entryinfo Created: 04/27/2026 17:51 Changes: 04/27/2026 17:51 (77) Complete: 🔍 Cache ID: 99:C1B:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸