CVE-2020-25710

What it is

A flaw was found in OpenLDAP in versions before 2.4.56. This flaw allows an attacker who sends a malicious packet processed by OpenLDAP to force a failed assertion in csnNormalize23(). The highest threat from this vulnerability is to system availability.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

2.7% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2021-05-28 11:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-14 10:17 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.7% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2021-05-28 11:15 UTC

Last modified

2026-10-14 10:17 UTC

Exploit probability

2.7% · EPSS, next 30 days

Weakness

CWE-617

Record status

Modified

Affected

• Openldap < 2.4.56
• Redhat Jboss Core Services
• Redhat Jboss Enterprise Application Platform 5.0.0
• Redhat Jboss Enterprise Web Server 2.0.0
• Redhat Enterprise Linux 5.0
• Redhat Enterprise Linux 6.0
• Redhat Enterprise Linux 7.0
• Debian Linux 9.0

Attack profile CVSS 3.1 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2020-25710.md and follow it. Check whether this project is affected by CVE-2020-25710. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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