CVE-2015-4699: Cross-site scripting (XSS) vulnerability in the Splash Portal in Cloud4Wi before 5.9.7 allows remote attackers

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MEDIUM 6.1DOWNGRADE

CVE-2015-4699 is a medium-severity flaw (CVSS 6.1) affecting splash portal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in the Splash Portal in Cloud4Wi before 5.9.7 allows remote attackers to inject arbitrary web script or HTML via the recoveryMessage parameter to the default URI.

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	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-79
Published	2017-08-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cloud4wi

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

Am I affected?

Timeline

2017-08-24 21:29 UTCPublished CVE record published
2026-06-17 00:27 UTCUpdated Record last modified

cloud4wi splash portal DOWNGRADE

Affected: 5.9.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.9.6

1. Check installed version

apt-cache policy splash-portal || rpm -q splash-portal || splash-portal --version

2. No fixed release: DOWNGRADE to a release before 5.9.6 (Debian / Ubuntu)

apt-cache madison splash-portal sudo apt install splash-portal=<VERSION_BEFORE_5.9.6> sudo apt-mark hold splash-portal

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

dnf --showduplicates list splash-portal sudo dnf downgrade splash-portal-<VERSION_BEFORE_5.9.6> sudo dnf versionlock add splash-portal

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-2015-4699?

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

Is CVE-2015-4699 being exploited?

CVE-2015-4699 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-2015-4699 affect?

CVE-2015-4699 affects splash portal. Severity is medium (CVSS 6.1). Cross-site scripting (XSS) vulnerability in the Splash Portal in Cloud4Wi before 5.9.7 allows remote attackers to inject arbitrary web script or HTML via the recoveryMessage parameter to the default URI.

How urgent is CVE-2015-4699?

Priority 46/100. Public exploit reference

References

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