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).

Published: 2018-07-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-1337 is rated High Risk (73.9/100): CVSS Critical severity, with high exploitation likelihood (EPSS 5.31%, 92th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.65% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-1337

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.66% 5.31% +2.65%
2 2026-01-24 2.80% 2.66% -0.14%
3 2025-10-07 — 2.80% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-1337

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-1337

GitHub Security Advisory for CVE-2018-1337

GHSA-cfw5-v7cw-69cw · Severity: critical · Ecosystem: maven — Credential leak in org.apache.directory.api:apache-ldap-api

OS Trackers for CVE-2018-1337

vendor priority summary link
debian not yet assigned CVE-2018-1337 not yet assigned priority: Debian including 1 source packages (apache-directory-api), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. https://security-tracker.debian.org/tracker/CVE-2018-1337

Affected software / configurations for CVE-2018-1337

Vendor Product Version Raw CPE
apache directory_ldap_api < 1.0.2 cpe:2.3:a:apache:directory_ldap_api:*:*:*:*:*:*:*:*

References for CVE-2018-1337

URL Tags
http://www.securityfocus.com/bid/104744 Third Party Advisory VDB Entry
https://lists.apache.org/thread.html/d66081195e9a02ee7cc20fb243b60467d1419586eed28297d820768f%40%3Cdev.directory.apache.org%3E
https://lists.apache.org/thread.html/r0e645b3f6ca977dc60b7cec231215c59a9471736c2402c1fef5a0616%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/r1815fb5b0c345f571c740e7a1b48d7477647edd4ffcf9d5321e69446%40%3Cdev.kafka.apache.org%3E
https://lists.apache.org/thread.html/r1a258430d820a90ff9d4558319296cc517ff2252327d7b3546d16749%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/r4da40aa50cfdb2158898f2bc6df81feec1d42c6a06db6537d5cc0496%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/r55e74532e7f9e84ecfa56b4e0a50a5fe0ba6f7a76880520e4400b0d7%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/r56b304fb9960c869995efbb31da3b9b7c6d53ee31f7f7048eb80434b%40%3Cdev.kafka.apache.org%3E
cvelogic Threat Intelligence