CVE-2025-62400VulnerabilityPublished 23 Oct 2025

CVE-2025-62400: fedora · Information Exposure

Source CVE Database V5

Not known to be exploited · CVSS 4.3 Medium.

Data as of 25 Oct 2026, 19:02 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 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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 23 Oct 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 2026-10-25.

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 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-2025-62400, organizations should first apply any official patches or updates released by Moodle that address this vulnerability. If patches are not yet available, administrators should review and tighten permission assignments, ensuring that only trusted users have the ability to create calendar events, especially if they should not access hidden group information. Implementing strict role-based access control (RBAC) policies can limit exposure. Additionally, administrators can audit existing calendar event permissions and hidden group configurations to identify and remediate any inconsistencies. Monitoring logs for unusual access patterns related to calendar event creation may help detect exploitation attempts. Educating users about the sensitivity of group information and enforcing least privilege principles will reduce risk. Finally, organizations should stay informed about Moodle security advisories and promptly deploy updates when released.

Description

Moodle exposed the names of hidden groups to users who had permission to create calendar events but not to view hidden groups. This could reveal private or restricted group information.

Impact

The primary impact of CVE-2025-62400 is the unauthorized disclosure of sensitive information, specifically the names of hidden groups within Moodle. This can lead to privacy violations, as group names may reveal confidential organizational structures, project details, or membership information. Such information leakage can facilitate targeted social engineering attacks, phishing campaigns, or insider threats by providing attackers with insights into restricted groups. Although the vulnerability does not affect system integrity or availability, the breach of confidentiality can undermine trust in the platform and potentially violate data protection regulations, especially in educational or governmental institutions. The scope of impact is limited to users who have calendar event creation permissions but not group viewing rights, which may include a broad set of users depending on organizational role assignments. Since Moodle is widely used globally in education and training environments, the exposure of sensitive group information could have reputational and compliance consequences for affected organizations.

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 27 Feb 2026, 15:50 UTC

Technical details

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