VulnerabilityPublished 21 Sep 2026

CVE-2026-94211: Hyve5 Leantime · Cross-site Scripting

Affects Hyve5 LeantimeSource CVE Database V5

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Public exploit available · CVSS 4.8 Medium.

Data as of 5 Nov 2026, 23:24 UTC

CVSS 4.0 base score

4.8Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 28% 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 21 Sep 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 5 Nov 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
Hyve5Leantime	Affected 3.9.0 – 3.9.8 9 affected builds	Fixed in–
Packagisthyve5/leantime`pkg:composer/hyve5/leantime`Other threats	Affected 3.9.0 – 3.9.8 9 affected builds	Fixed in–

CPE configurations (1)

cpe:2.3:a:leantime:leantime:*:*:*:*:*:*:*:*

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AI-suggested

Users should restrict 'EDIT' permissions to trusted individuals only and consider monitoring or limiting access to the project dashboard until a fix is released.

Description

A vulnerability has been found in Hyve5 Leantime up to 3.9.8. Affected by this issue is some unknown functionality of the file /app/Domain/Dashboard/Templates/show.blade.php of the component Project Dashboard. Such manipulation leads to cross site scripting. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. "EDIT perm" needed to plant; fires cross-user for anyone viewing the project dashboard since the poisoned label name is echoed raw. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

Successful exploitation can lead to cross-site scripting attacks affecting users who view the poisoned project dashboard. This could allow attackers to execute arbitrary scripts in the context of other users, potentially leading to session hijacking, unauthorized actions, or data theft. However, exploitation requires the attacker to have 'EDIT' permissions, limiting the attack vector to users with elevated privileges. The CVSS score is 4.8 (medium severity), reflecting the moderate impact and required privileges.

Summary

This vulnerability in Hyve5 Leantime up to version 3.9.8 allows an attacker with 'EDIT' permissions to inject malicious JavaScript code into the project dashboard via a label name. The injected script executes in the context of other users viewing the dashboard, resulting in a cross-site scripting attack. The vulnerability is located in the show.blade.php template file of the Project Dashboard component, where input is echoed raw without sanitization. The vulnerability has been publicly disclosed, but no vendor response or patch has been provided.

References

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