CVE-2018-20159: i-doit open 1.11.2 allows Remote Code Execution because ZIP archives are mishandled

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HIGH 7.2DOWNGRADE

CVE-2018-20159 is a high-severity flaw (CVSS 7.2) affecting i-doit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

i-doit open 1.11.2 allows Remote Code Execution because ZIP archives are mishandled. It has an upload feature that allows an authenticated user with the administrator role to upload arbitrary files to the main website directory. Exploitation involves uploading a ".php" file within a ".zip" file because a ZIP archive is accepted by /admin/?req=modules&action=add as a plugin, and extracted to the main directory. In order for the ".zip" file to be a

Why this priority

High severity
EPSS top 4%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	9.9% (top 4%)
CISA exploited list	No
Weakness	CWE-20
Published	2018-12-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: i-doit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-12-15 05:29 UTCPublished CVE record published
2026-06-17 01:52 UTCUpdated Record last modified

i-doit i-doit DOWNGRADE

Affected: 1.11.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.11.2

1. Check installed version

apt-cache policy i-doit || rpm -q i-doit || i-doit --version

2. No fixed release: DOWNGRADE to a release before 1.11.2 (Debian / Ubuntu)

apt-cache madison i-doit sudo apt install i-doit=<VERSION_BEFORE_1.11.2> sudo apt-mark hold i-doit

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

dnf --showduplicates list i-doit sudo dnf downgrade i-doit-<VERSION_BEFORE_1.11.2> sudo dnf versionlock add i-doit

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: i-doit CMDB 1.11.2 - Remote Code Execution

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-2018-20159?

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

Is CVE-2018-20159 being exploited?

CVE-2018-20159 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-2018-20159 affect?

CVE-2018-20159 affects i-doit. Severity is high (CVSS 7.2). i-doit open 1.11.2 allows Remote Code Execution because ZIP archives are mishandled. It has an upload feature that allows an authenticated user with the administrator role to upload arbitrary files to the main website directory. Exploitatio

How urgent is CVE-2018-20159?

Priority 54/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2023-46003 MEDIUM 5.4 UPGRADE I-doit pro 25 and below is vulnerable to Cross Site Scripting (XSS) via index.php.
CVE-2023-37756 CRITICAL 9.8 UPGRADE I-doit pro 25 and below and I-doit open 25 and below employ weak password requirements for Administrator accou
CVE-2023-37755 CRITICAL 9.8 UPGRADE i-doit pro 25 and below and I-doit open 25 and below are configured with insecure default administrator creden
CVE-2023-37739 MEDIUM 6.5 UPGRADE i-doit Pro v25 and below was discovered to be vulnerable to path traversal.
CVE-2023-34830 MEDIUM 5.4 UPGRADE i-doit Open v24 was discovered to contain a reflected cross-site scripting (XSS) vulnerability via the timeout

References

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