How severe is CVE-2018-1337?

CVE-2018-1337 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-1337 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1337?

CVE-2018-1337 affects Apache Directory Ldap Api. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1337?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-1337 published?

CVE-2018-1337 was published on 2018-07-10 and last updated on 2026-06-17.

CVE-2018-1337

CVE-2018-1337 is a critical-severity vulnerability in Apache Directory Ldap Api with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 5.0
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Apache Directory Ldap Api
Published: 2018-07-10
Last modified: 2026-06-17

Description

In Apache Directory LDAP API before 1.0.2, a bug in the way the SSL Filter was setup made it possible for another thread to use the connection before the TLS layer has been established, if the connection has already been used and put back in a pool of connections, leading to leaking any information contained in this request (including the credentials when sending a BIND request).

Frequently asked questions

What is CVE-2018-1337?: In Apache Directory LDAP API before 1.0.2, a bug in the way the SSL Filter was setup made it possible for another thread to use the connection before the TLS layer has been established, if the connection has already been used and put back in a pool of connections, leading to leaking any information contained in this request (including the credentials when sending a BIND request).
How severe is CVE-2018-1337?: CVE-2018-1337 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-1337 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1337?: CVE-2018-1337 affects Apache Directory Ldap Api. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1337?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-1337 published?: CVE-2018-1337 was published on 2018-07-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:directory_ldap_api:*:*:*:*:*:*:*:*

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