CVE-2018-18776: Microstrategy Web, version 7, does not sufficiently encode user-controlled inputs, resulting in a Cross-Site S

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MEDIUM 6.1DOWNGRADE

CVE-2018-18776 is a medium-severity flaw (CVSS 6.1) affecting microstrategy web. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Microstrategy Web, version 7, does not sufficiently encode user-controlled inputs, resulting in a Cross-Site Scripting (XSS) vulnerability via the admin/admin.asp ShowAll parameter. NOTE: this is a deprecated product.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-11-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: microstrategy

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

Am I affected?

Timeline

2018-11-01 17:29 UTCPublished CVE record published
2026-06-17 01:47 UTCUpdated Record last modified

microstrategy microstrategy web DOWNGRADE

Affected: 7

Fixed in: no fixed release known

Safe to downgrade to: a release before 7

1. Check installed version

apt-cache policy microstrategy-web || rpm -q microstrategy-web || microstrategy-web --version

2. No fixed release: DOWNGRADE to a release before 7 (Debian / Ubuntu)

apt-cache madison microstrategy-web sudo apt install microstrategy-web=<VERSION_BEFORE_7> sudo apt-mark hold microstrategy-web

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

dnf --showduplicates list microstrategy-web sudo dnf downgrade microstrategy-web-<VERSION_BEFORE_7> sudo dnf versionlock add microstrategy-web

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: Microstrategy Web 7 - Cross-Site Scripting / Directory Traversal

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-2018-18776?

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

Is CVE-2018-18776 being exploited?

CVE-2018-18776 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-2018-18776 affect?

CVE-2018-18776 affects microstrategy web. Severity is medium (CVSS 6.1). Microstrategy Web, version 7, does not sufficiently encode user-controlled inputs, resulting in a Cross-Site Scripting (XSS) vulnerability via the admin/admin.asp ShowAll parameter. NOTE: this is a deprecated product.

How urgent is CVE-2018-18776?

Priority 47/100. Public exploit reference

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References

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