VulnerabilityPublished 23 Jul 2025Updated 26 Feb 2026

CVE-2025-53882: openSUSE Tumbleweed mailman3 · Reliance on Untrusted Inputs in a Security Decision

Affects openSUSE Tumbleweed mailman3Source CVE Database V5

Not known to be exploited · CVSS 4.4 Medium : upgrade the openSUSE opensuse/mailman3 package to 3.3.10-2.1 when convenient.

Data as of 26 Oct 2026, 15:59 UTC

CVSS 3.1 base score

4.4Medium

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

EPSS: 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 3.3.10-2.1

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

Attack Vector: Local
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: Low

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

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
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: None: There is no loss of confidentiality within 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: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Jul 2025
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 the openSUSE opensuse/mailman3 package to 3.3.10-2.1.

Affected software

Product	Affected	Fixed in
openSUSEopensuse/mailman3`pkg:rpm/opensuse/mailman3`Other threats	Affected <3.3.10-2.1	Fixed in 3.3.10-2.1

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

AI-suggested

In the interim, administrators should restrict access to the mailman user account to trusted personnel only and audit local user privileges to minimize the risk of exploitation. Reviewing and hardening logrotate configurations to ensure that signal sending is properly controlled and validated can reduce exposure. Employing process isolation techniques, such as containerization or mandatory access controls (e.g., SELinux, AppArmor), can limit the ability of the mailman user to affect arbitrary processes. Regularly monitoring system logs for unusual SIGHUP signals or process restarts related to mailman3 can help detect attempted exploitation. Additionally, consider disabling or limiting the use of logrotate scripts that allow signal sending if not essential. Implementing robust local user authentication and intrusion detection systems will further reduce the risk of local privilege misuse.

Description

A Reliance on Untrusted Inputs in a Security Decision vulnerability in the logrotate configuration for openSUSE mailman3 package allows the mailman user to sent SIGHUP to arbitrary processes. This issue affects openSUSE Tumbleweed: from ? before 3.3.10-2.1.

Impact

The primary impact of CVE-2025-53882 is on the integrity and availability of systems running openSUSE Tumbleweed with the mailman3 package. An attacker with mailman user privileges can send SIGHUP signals to arbitrary processes, which can cause those processes to reload configurations, terminate, or behave unexpectedly. This can disrupt mail services or other critical processes, leading to denial of service or unauthorized process manipulation. Since the attack requires local access with mailman user privileges, the risk is limited to environments where such access is possible, such as multi-user systems or compromised accounts. The lack of confidentiality impact reduces the risk of data leakage, but the potential for service disruption can affect organizational operations, especially in environments relying on mailman3 for mailing list management or communications.

CWE-807Reliance on Untrusted Inputs in a Security Decision (opens in a new tab)
Base weaknessLikelihood of exploit: HighOWASP Top 10 A06:2025: Insecure Design (opens in a new tab)
The product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism.
Architecture and Design · Attack Surface Reduction
Store state information and sensitive data on the server side only.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks…
OWASP Cheat Sheets
Secure Design Principles (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

bugzilla.suse.com/show_bug.cgi?id=CVE-2025-53882 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Feb 2026, 03:28 UTC

WeaknessesCWE-807

Technical details

References

Community reviews

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