VulnerabilityPublished 9 Dec 2024Updated 12 Dec 2024

CVE-2024-55578: Zammad · Sensitive Data in Logs

Source CVE Database V5

Not known to be exploited · CVSS 4.3 Medium · fixed in 6.4.1 : update affected systems when convenient.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score

4.3Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 6.4.1

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: None
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: 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.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
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: None: There is no loss of integrity within 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 9 Dec 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

AI-suggested

To mitigate CVE-2024-55578, organizations should first upgrade Zammad to version 6.4.1 or later, where this logging issue has been addressed. Until the upgrade is applied, restrict access to log files to only trusted administrators and implement strict file permissions to prevent unauthorized reading. Review and sanitize existing log files to remove any sensitive credentials that may have been logged. Additionally, consider rotating any Microsoft Office 365 credentials and application secrets that may have been exposed to reduce the risk of compromise. Implement monitoring and alerting for unusual access patterns to log files and integrated services. Employ secure logging configurations that exclude sensitive data from logs and use encryption or secure storage for secrets. Conduct regular audits of logging practices and credential management policies to prevent similar issues. Finally, educate developers and administrators on secure coding and operational practices related to sensitive data handling.

Description

Zammad before 6.4.1 places sensitive data (such as auth_microsoft_office365_credentials and application_secret) in log files.

Impact

The primary impact of this vulnerability is the potential disclosure of sensitive authentication credentials and application secrets through log files. If an attacker gains access to these logs, they could retrieve Microsoft Office 365 credentials or application secrets, potentially leading to unauthorized access to integrated services or the Zammad platform. This could result in data breaches, unauthorized ticket access, or lateral movement within an organization's network. Although the vulnerability does not directly affect system integrity or availability, the confidentiality breach could have cascading effects, including exposure of customer data or internal communications managed through Zammad. Organizations with extensive use of Microsoft Office 365 integrations and those that rely heavily on Zammad for customer support are particularly at risk. The requirement for low privileges to exploit means that insider threats or attackers who have gained limited access could leverage this vulnerability. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers often target exposed credentials for further compromise.

CWE-532Insertion of Sensitive Information into Log File (opens in a new tab)
Base weaknessLikelihood of exploit: MediumOWASP Top 10 A09:2025: Security Logging & Alerting Failures (opens in a new tab)
The product writes sensitive information to a log file.
Architecture and Design · Implementation
Consider seriously the sensitivity of the information written into log files. Do not write secrets into the log files.
Distribution
Remove debug log files before deploying the application into production.
Operation
Protect log files against unauthorized read/write.
OWASP Cheat Sheets
Application Logging Vocabulary (opens in a new tab)
Logging (opens in a new tab)
OWASP ASVS 4.0.3
V7.1.1 (opens in a new tab)
V7.1.2 (opens in a new tab)
V8.3.5 (opens in a new tab)
Attack patterns
Fuzzing for application mapping (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

zammad.com/en/advisories/zaa-2024-05 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 27 Feb 2026, 23:55 UTC

WeaknessesCWE-532

Technical details

References

Community reviews

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