CVE-2026-33209 | avo-hq avo up to 3.30.2 return_to cross site scripting (GHSA-762r-27w2-q22j)

VDB-352302 · CVE-2026-33209 · GHSA-762R-27W2-Q22J AVO-HQ AVO UP TO 3.30.2 RETURN_TO CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.1 $0-$5k 0.70+ Summaryinfo A vulnerability was found in avo-hq avo up to 3.30.2. It has been declared as problematic. Impacted is an unknown function. The manipulation of the argument return_to results in cross site scripting. This vulnerability is reported as CVE-2026-33209. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component. Detailsinfo A vulnerability was found in avo-hq avo up to 3.30.2. It has been classified as problematic. Affected is some unknown processing. The manipulation of the argument return_to with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes: Avo is a framework to create admin panels for Ruby on Rails apps. Prior to version 3.30.3, a reflected cross-site scripting (XSS) vulnerability exists in the return_to query parameter used in the avo interface. An attacker can craft a malicious URL that injects arbitrary JavaScript, which is executed when he clicks a dynamically generated navigation button. This issue has been patched in version 3.30.3. The advisory is available at github.com. This vulnerability is traded as CVE-2026-33209 since 03/18/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project. Upgrading to version 3.30.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 4453d39ddc6309f3bc8ada73ef21e1971112de7d 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 Vendor avo-hq Name avo Version 3.30.0 3.30.1 3.30.2 License open-source Website Product: https://github.com/avo-hq/avo/ 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: 4.3 VulDB Meta Temp Score: 4.1 VulDB Base Score: 4.3 VulDB Temp Score: 4.1 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: 🔒 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: avo 3.30.3 Patch: 4453d39ddc6309f3bc8ada73ef21e1971112de7d Timelineinfo 03/18/2026 CVE reserved 03/21/2026 +3 days Advisory disclosed 03/21/2026 +0 days VulDB entry created 03/21/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-762r-27w2-q22j Status: Confirmed CVE: CVE-2026-33209 (🔒) GCVE (CVE): GCVE-0-2026-33209 GCVE (VulDB): GCVE-100-352302 Entryinfo Created: 03/21/2026 08:13 Changes: 03/21/2026 08:13 (71) Complete: 🔍 Cache ID: 99:083:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸