VulnerabilityPublished 1 Jan 2026Updated 23 Feb 2026

CVE-2025-15416: xnx3 wangmarket · Cross-site Scripting

Affects xnx3 wangmarketSource CVE Database V5

Public exploit available · CVSS 4.8 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 4.0 base score

4.8Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: High
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: High: The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 1 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
GitHubxnx3/wangmarket`pkg:github/xnx3/wangmarket`Other threats	Affected 6.0 – 6.4 5 affected builds	Fixed in–

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AI-suggested

To mitigate CVE-2025-15416, organizations should first assess their deployment of xnx3 wangmarket and identify if affected versions (6.0 to 6.4) are in use. Given the absence of an official patch, immediate mitigations include implementing web application firewall (WAF) rules to detect and block malicious input targeting the /siteVar/save.do endpoint, especially filtering suspicious Remark/Variable Value parameters. Input validation and output encoding should be enforced at the application level if source code access is available, sanitizing all user-supplied data before rendering. Additionally, organizations should educate users about the risks of interacting with untrusted links or inputs that could trigger XSS attacks. Monitoring web logs for anomalous requests to the vulnerable endpoint can help detect exploitation attempts. Network segmentation and least privilege principles should be applied to limit the impact of compromised accounts. Finally, organizations should engage with the vendor for updates and consider alternative solutions if the vendor remains unresponsive. Regular security assessments and penetration testing focusing on XSS vectors will help identify residual risks.

Description

A vulnerability was found in xnx3 wangmarket up to 6.4. This affects an unknown function of the file /siteVar/save.do of the component Add Global Variable Handler. The manipulation of the argument Remark/Variable Value results in cross site scripting. The attack can be executed remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

The primary impact of CVE-2025-15416 is on the confidentiality and integrity of user data within affected xnx3 wangmarket deployments. Successful exploitation can lead to session hijacking, theft of sensitive information such as credentials or personal data, and unauthorized actions performed on behalf of the victim user. This can result in account compromise, data leakage, and potential further exploitation within the affected environment. While the vulnerability does not directly affect system availability, the indirect consequences such as reputational damage, loss of customer trust, and potential regulatory penalties for data breaches can be significant. Organizations relying on xnx3 wangmarket for e-commerce or web services may face targeted attacks exploiting this vulnerability, especially given the public availability of exploit code and the vendor's lack of response. The requirement for user interaction limits automated exploitation but does not eliminate risk, as social engineering or phishing can be used to trigger the attack. Overall, the vulnerability poses a moderate threat that can escalate if combined with other weaknesses or poor security practices.

Summary

CVE-2025-15416 is a medium-severity cross-site scripting (XSS) vulnerability affecting xnx3 wangmarket versions 6.0 through 6.4. The flaw exists in the /siteVar/save.do endpoint within the Add Global Variable Handler component, where the Remark/Variable Value parameter is not properly sanitized before being reflected in the web application. This allows remote attackers to inject arbitrary JavaScript code that executes in the context of users who interact with the vulnerable functionality. The attack vector is network accessible (AV:N), requires low attack complexity (AC:L), no authentication (AT:N), but user interaction (UI:P) is necessary to trigger the malicious script. The vulnerability impacts the integrity and confidentiality of user sessions by enabling theft of cookies, credentials, or execution of unauthorized actions on behalf of the user. The vendor was notified early but has not issued any patches or advisories, and public exploit code is available, increasing the risk of exploitation. The vulnerability does not affect system availability or require privileges, but the lack of vendor response and public exploits heighten the urgency for organizations to implement mitigations. The CVSS 4.8 score reflects the moderate risk, primarily due to the need for user interaction and limited impact on system integrity and availability.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 23 Feb 2026, 22:58 UTC

Technical details

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