VulnerabilityPublished 8 Mar 2026Updated 11 Mar 2026

CVE-2026-3721: 1024-lab SmartAdmin · Cross-site Scripting

Affects 1024-lab SmartAdminSource CVE Database V5

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Public exploit available · CVSS 5.1 Medium.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score

5.1Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 20% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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: Low
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: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
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 8 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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
1024-labSmartAdmin	Affected 3.0 – 3.29 30 affected builds	Fixed in–
lab1024SmartAdmin	Affected 3.0 – 3.29 30 affected builds	Fixed in–

AI-suggested

Given the absence of an official patch or vendor guidance, organizations should implement immediate compensating controls. First, apply strict input validation and output encoding on all user-supplied data within the Help Documentation Module, if source code access and modification are possible. Deploy web application firewalls (WAFs) with custom rules to detect and block typical XSS payloads targeting SmartAdmin endpoints. Educate users to avoid clicking suspicious links and enable browser security features such as Content Security Policy (CSP) to restrict script execution origins. Monitor application logs for unusual activity indicative of XSS exploitation attempts. If feasible, isolate or restrict access to the SmartAdmin interface to trusted networks and users only. Regularly review and update incident response plans to address potential exploitation scenarios. Finally, maintain vigilance for vendor updates or community patches and apply them promptly once available.

Description

A weakness has been identified in 1024-lab/lab1024 SmartAdmin up to 3.29. The affected element is an unknown function of the file sa-base/src/main/java/net/lab1024/sa/base/module/support/helpdoc/domain/form/HelpDocAddForm.java of the component Help Documentation Module. This manipulation causes cross site scripting. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

The primary impact of CVE-2026-3721 is on the confidentiality and integrity of data within affected SmartAdmin deployments. Successful exploitation can lead to theft of sensitive information such as session tokens, user credentials, or personal data through malicious script execution. Attackers may also perform unauthorized actions on behalf of users, potentially escalating privileges or manipulating application behavior. Although availability is not directly affected, compromised user accounts or administrative functions could indirectly disrupt operations. Organizations relying on SmartAdmin for administrative or operational tasks may face reputational damage, compliance violations, and increased risk of further compromise if attackers leverage this vulnerability as an initial foothold. The broad range of affected versions increases exposure, especially in environments where patching is delayed or vendor support is lacking. The public availability of exploit code heightens the likelihood of targeted attacks, particularly against high-value targets using this software.

Summary

CVE-2026-3721 identifies a cross-site scripting (XSS) vulnerability in the 1024-lab SmartAdmin product, specifically within the Help Documentation Module's HelpDocAddForm.java file. The vulnerability arises from insufficient input validation or sanitization in an unknown function, allowing attackers to inject malicious JavaScript code. This flaw affects all versions up to 3.29, encompassing a broad range of releases. The attack vector is remote and does not require authentication, increasing the risk of exploitation. However, user interaction is necessary for the attack to succeed, such as a victim clicking a malicious link or interacting with crafted content. The vulnerability impacts the confidentiality and integrity of user data by potentially enabling session hijacking, credential theft, or unauthorized actions within the application context. The vendor was contacted but has not issued a patch or mitigation guidance, and a public exploit is available, increasing the urgency for organizations to implement defensive measures. The CVSS 4.0 score of 5.1 reflects a medium severity, considering the ease of exploitation and limited scope of impact. No known exploits in the wild have been reported yet, but the availability of proof-of-concept code raises the risk of future attacks. The vulnerability does not affect system availability or require privileges, but the lack of vendor response and broad version impact necessitate proactive risk management.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 15 Mar 2026, 09:05 UTC

Technical details

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