VulnerabilityPublished 17 Dec 2021Updated 30 May 2025

CVE-2021-44035: Wolters Kluwer TeamMate AM 12.4 Update 1 mishandles attachment uploads, such that an authenticated

Source CVE Database V5

Not known to be exploited · CVSS 4.4 Medium.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score

4.4Medium

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

EPSS: 0.5% chance of exploitation in 30 days – higher than 46% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

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

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

Attack Complexity: High: A successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected. For example, a successful attack may require an attacker to: gather knowledge about the environment in which the vulnerable target/component exists; prepare the target environment to improve exploit reliability; or inject themselves into the logical network path between the target and the resource requested by the victim in order to read and/or modify network communications (e.g., a man in the middle attack).
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).
Availability: None: There is no impact to availability within the impacted component.
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.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
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.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Dec 2021
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

AI-suggested

Organizations using TeamMate AM 12.4 Update 1 should immediately review user permissions to ensure that only trusted personnel have attachment upload capabilities. Implement strict access controls and monitor for unusual upload/download activities. Employ application-layer security controls such as file type validation, sandboxing of uploaded files, and endpoint protection to detect and block malicious payloads. Conduct regular audits of user activity logs to detect potential exploitation attempts. Additionally, enforce multi-factor authentication to reduce the risk of credential compromise. If possible, isolate the audit management system from general user networks to limit exposure. Finally, educate users about the risks of uploading and executing untrusted files.

Description

Wolters Kluwer TeamMate AM 12.4 Update 1 mishandles attachment uploads, such that an authenticated user may download and execute malicious files.

Impact

For European organizations, especially those in finance, auditing, and compliance sectors where TeamMate AM is commonly deployed, this vulnerability could allow malicious insiders or compromised users to execute arbitrary code by uploading malicious attachments. This could lead to unauthorized data access, manipulation of audit records, or disruption of audit processes, undermining regulatory compliance and internal controls. Given the sensitivity of audit data, exploitation could result in reputational damage, regulatory penalties under GDPR or other frameworks, and potential financial loss. The requirement for authentication and user interaction somewhat limits the attack surface but insider threats or compromised credentials remain a significant risk. The changed scope (S:C) indicates that the vulnerability can affect resources beyond the initially vulnerable component, potentially impacting broader system integrity.

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 8 Jul 2025, 15:40 UTC

Technical details

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