MaxSite CMS up to 109.3 ushki Plugin f_ushka_new/f_ushk cross site scripting

Summaryinfo

A vulnerability was found in MaxSite CMS up to 109.3. It has been declared as problematic. The affected element is an unknown function of the component ushki Plugin. Executing a manipulation of the argument f_ushka_new/f_ushk can lead to cross site scripting. This vulnerability is handled as CVE-2026-7016. The attack can be executed remotely. Additionally, an exploit exists. It is recommended to upgrade the affected component. The vendor was informed early about this issue. They classify it as a "Self-XSS". They deployed a countermeasure: "Nevertheless, we consider this a violation of secure coding standards. The lack of filtering via `htmlspecialchars()` has already been fixed in the latest patch to prevent incorrect data display."

Detailsinfo

A vulnerability classified as problematic was found in MaxSite CMS up to 109.3. This vulnerability affects some unknown processing of the component ushki Plugin. The manipulation of the argument f_ushka_new/f_ushk 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 advisory is shared for download at github.com. This vulnerability was named CVE-2026-7016. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation needs additional levels of successful authentication. Successful exploitation requires user interaction by the victim. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1059.007.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. The vendor was informed early about this issue. They classify it as a "Self-XSS". They deployed a countermeasure: "Nevertheless, we consider this a violation of secure coding standards. The lack of filtering via `htmlspecialchars()` has already been fixed in the latest patch to prevent incorrect data display."

Upgrading to version 109.4 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7 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.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.4
VulDB Meta Temp Score: 2.2

VulDB Base Score: 2.4
VulDB Temp Score: 2.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: CMS 109.4
Patch: 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7

Timelineinfo

04/25/2026 Advisory disclosed
04/25/2026 +0 days VulDB entry created
04/25/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-7016 (🔒)
GCVE (CVE): GCVE-0-2026-7016
GCVE (VulDB): GCVE-100-359596
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/25/2026 12:19
Changes: 04/25/2026 12:19 (62)
Complete: 🔍
Submitter: konchan
Cache ID: 216::103

Submitinfo

Accepted

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