CVE-2026-24773VulnerabilityPublished 3 Feb 2026

CVE-2026-24773: gunet openeclass · Insecure Direct Object Reference

Affects gunet openeclassSource CVE Database V5

Not known to be exploited · CVSS 7.5 High : upgrade to 4.2 soon.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

7.5High

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

EPSS: 0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 4.2

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
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: 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: 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: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
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 3 Feb 2026
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

Upgrade openeclass and gunet/openeclass to 4.2.

Affected software

Product	Affected	Fixed in
gunetopeneclass	Affected <4.2	Fixed in 4.2
GitHubgunet/openeclass`pkg:github/gunet/openeclass`Other threats	Affected <4.2	Fixed in 4.2

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

AI-suggested

The primary mitigation is to upgrade all Open eClass installations to version 4.2 or later, where the vulnerability has been patched. Organizations should immediately inventory their Open eClass deployments and prioritize patching. In addition, administrators should review and strengthen access control mechanisms to ensure that user identifiers cannot be exploited to access unauthorized data. Implementing logging and monitoring to detect unusual access patterns or repeated requests for different user IDs can help identify exploitation attempts. Network-level protections such as web application firewalls (WAFs) can be configured to detect and block suspicious requests targeting user identifiers. Educating users and administrators about the risks of exposing predictable identifiers and enforcing the principle of least privilege in system design are also recommended. Finally, organizations should conduct regular security assessments and penetration testing to verify that authorization controls are effective.

Description

CVE-2026-24773 is a high-severity Insecure Direct Object Reference (IDOR) vulnerability in the Open eClass platform versions prior to 4.2. It allows unauthenticated remote attackers to bypass authorization controls by manipulating user-controlled keys to access personal files of other users. The vulnerability arises from predictable user identifiers that can be directly requested without proper access checks. Exploitation does not require authentication or user interaction and impacts confidentiality but not integrity or availability. The issue has been patched in version 4.2. European educational institutions using Open eClass versions before 4.2 are at risk, especially in countries with widespread adoption of this platform. Organizations should upgrade to version 4.

Impact

For European organizations, particularly educational institutions using Open eClass, this vulnerability can lead to unauthorized disclosure of personal and potentially sensitive information of students, faculty, and staff. Such data breaches can result in privacy violations, regulatory non-compliance (e.g., GDPR), reputational damage, and potential legal consequences. The exposure of personal files could also facilitate further targeted attacks such as phishing or social engineering. Since the vulnerability does not affect data integrity or system availability, the primary concern is confidentiality. The ease of exploitation without authentication increases the risk of widespread data leakage. Organizations relying on versions prior to 4.2 must consider the risk of unauthorized data access and the implications for data protection obligations under European law.

CWE-639Authorization Bypass Through User-Controlled Key (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #24OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
Architecture and Design
For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
Architecture and Design · Implementation
Make sure that the key that is used in the lookup of a specific user's record is not controllable externally by the user or that any tampering can be detected.
Architecture and Design
Use encryption in order to make it more difficult to guess other legitimate values of the key or associate a digital signature with the key so that the server can verify that there has been no tampering.
OWASP Cheat Sheets
Access Control (opens in a new tab)
Authorization Testing Automation (opens in a new tab)
Cross-Site Request Forgery Prevention (opens in a new tab)
Insecure Direct Object Reference Prevention (opens in a new tab)
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V4.1.2 (opens in a new tab)
V4.2.1 (opens in a new tab)
V8.3.8 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

github.com/gunet/openeclass/security/advisories/GHSA-63pm-pff4-xc9c (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 11 Feb 2026, 11:58 UTC

WeaknessesCWE-639

Technical details

References

Community reviews

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