CVE-2023-26218: The Web Client component of TIBCO Software Inc.'s TIBCO Nimbus contains easily exploitable Reflected Cross Sit

Q: How do I fix CVE-2023-26218?

nimbus: upgrade to 10.6.1. Exact commands for each OS are on this page.

Q: Is CVE-2023-26218 being exploited?

CVE-2023-26218 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-26218 affect?

CVE-2023-26218 affects nimbus. Severity is high (CVSS 8.0). The Web Client component of TIBCO Software Inc.'s TIBCO Nimbus contains easily exploitable Reflected Cross Site Scripting (XSS) vulnerabilities that allow a low privileged attacker to social engineer a legitimate user with network access to

This month

HIGH 8.0UPGRADE

CVE-2023-26218 is a high-severity flaw (CVSS 8.0) affecting nimbus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Web Client component of TIBCO Software Inc.'s TIBCO Nimbus contains easily exploitable Reflected Cross Site Scripting (XSS) vulnerabilities that allow a low privileged attacker to social engineer a legitimate user with network access to execute scripts targeting the affected system or the victim's local system. A successful attack using this vulnerability requires human interaction from a person other than the attacker. Affected releases are

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-09-29
Last modified	2026-06-17

Publisher (CNA): TIBCO Software Inc. · Vendor: tibco

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

Am I affected?

Timeline

2023-09-29 18:15 UTCPublished CVE record published
2026-06-17 05:42 UTCUpdated Record last modified

tibco nimbus UPGRADE

Affected: < 10.6.1

Fixed in: 10.6.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 10.6.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nimbus

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nimbus

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2023-26218?

nimbus: upgrade to 10.6.1. Exact commands for each OS are on this page.

Is CVE-2023-26218 being exploited?

CVE-2023-26218 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-2023-26218 affect?

CVE-2023-26218 affects nimbus. Severity is high (CVSS 8.0). The Web Client component of TIBCO Software Inc.'s TIBCO Nimbus contains easily exploitable Reflected Cross Site Scripting (XSS) vulnerabilities that allow a low privileged attacker to social engineer a legitimate user with network access to

How urgent is CVE-2023-26218?

Priority 40/100. High severity

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References

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