CVE-2001-1018: Lotus Domino web server 5.08 allows remote attackers to determine the internal IP address of the server when N

Routine

MEDIUM 5.0DOWNGRADE

CVE-2001-1018 is a medium-severity flaw (CVSS 5.0) affecting domino. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Lotus Domino web server 5.08 allows remote attackers to determine the internal IP address of the server when NAT is enabled via a GET request that contains a long sequence of / (slash) characters.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Published	2001-09-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: lotus

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2001-09-20 04:00 UTCPublished CVE record published
2026-06-16 21:55 UTCUpdated Record last modified

lotus domino DOWNGRADE

Affected: 5.0.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.8

1. Check installed version

apt-cache policy domino || rpm -q domino || domino --version

2. No fixed release: DOWNGRADE to a release before 5.0.8 (Debian / Ubuntu)

apt-cache madison domino sudo apt install domino=<VERSION_BEFORE_5.0.8> sudo apt-mark hold domino

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list domino sudo dnf downgrade domino-<VERSION_BEFORE_5.0.8> sudo dnf versionlock add domino

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2001-1018?

domino: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2001-1018 being exploited?

CVE-2001-1018 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2001-1018 affect?

CVE-2001-1018 affects domino. Severity is medium (CVSS 5.0). Lotus Domino web server 5.08 allows remote attackers to determine the internal IP address of the server when NAT is enabled via a GET request that contains a long sequence of / (slash) characters.

How urgent is CVE-2001-1018?

Priority 38/100. No elevated risk signals yet.

Related CVEs

CVE-2000-1046 HIGH 10.0 DOWNGRADE Multiple buffer overflows in the ESMTP service of Lotus Domino 5.0.2c and earlier allow remote attackers to ca
CVE-2024-23562 MEDIUM 5.3 DOWNGRADE A security vulnerability in HCL Domino could allow disclosure of sensitive configuration information
CVE-2023-37539 HIGH 8.4 DOWNGRADE The Domino Catalog template is susceptible to a Stored Cross-Site Scripting (XSS) vulnerability
CVE-2023-37495 MEDIUM 5.9 UPGRADE Internet passwords stored in Person documents in the Domino® Directory created using the "Add Person" action o
CVE-2023-28010 MEDIUM 4.0 DOWNGRADE In some configuration scenarios, the Domino server host name can be exposed

References

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