VulnerabilityPublished 25 Jun 2024Updated 5 Nov 2024

CVE-2024-34400: virto.kanbanboardwebpart

Affects virto.kanbanboardwebpartSource CVE Database V5

Not known to be exploited · CVSS 6.1 Medium : upgrade to 5.3.5.1 when convenient.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score

6.1Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 5.3.5.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

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

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, 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: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
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 on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Jun 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
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), 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

Upgrade VirtoSoftware/virto.kanbanboardwebpart to 5.3.5.1.

Affected software

Product	Affected	Fixed in
NuGetVirtoSoftware/virto.kanbanboardwebpart`pkg:nuget/VirtoSoftware/virto.kanbanboardwebpart`Other threats	Affected <5.3.5.1	Fixed in 5.3.5.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

To mitigate CVE-2024-34400, organizations should promptly update the Virto Kanban Board Web Part to version 5.3.5.1 or later, where the vulnerability is addressed. In the absence of an immediate patch, administrators should consider restricting access to the vulnerable endpoint via web application firewalls (WAFs) or SharePoint permissions to limit exposure. Implementing Content Security Policy (CSP) headers can help reduce the impact of XSS by restricting script execution sources. Educate users to be cautious about clicking on suspicious links, especially those that may originate from untrusted sources. Regularly audit and monitor SharePoint logs for unusual activities that may indicate exploitation attempts. Additionally, review and harden SharePoint security configurations to minimize the potential damage from compromised user sessions.

Description

An issue was discovered in VirtoSoftware Virto Kanban Board Web Part before 5.3.5.1 for SharePoint 2019. There is /_layouts/15/Virto.KanbanTaskManager/api/KanbanData.ashx LinkTitle2 XSS.

Impact

The primary impact of CVE-2024-34400 is the potential for attackers to execute arbitrary scripts in the context of authenticated users of the Virto Kanban Board Web Part. This can lead to the theft of sensitive information such as session cookies or tokens, enabling session hijacking. Attackers may also perform unauthorized actions on behalf of the user, potentially modifying or exfiltrating data within SharePoint. While availability is not affected, the confidentiality and integrity of user data and interactions are at risk. Organizations with many users accessing the vulnerable component are at greater risk, especially if users have elevated privileges. The lack of authentication requirement for exploitation broadens the attack surface, although user interaction is necessary. This vulnerability could be leveraged as a stepping stone for more advanced attacks within an enterprise environment.

References

download.virtosoftware.com/Manuals/nu_ncsc_virto_one_kanban_board_5.3.3_pt_disclosure.pdf (opens in a new tab)

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