CVE-2017-7891: sourcebans-pp (SourceBans++) 1.5.4.7 has XSS in admin.comms.php via the rebanid parameter.

Routine

MEDIUM 6.1DOWNGRADE

CVE-2017-7891 is a medium-severity flaw (CVSS 6.1) affecting sourcebans-pp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

sourcebans-pp (SourceBans++) 1.5.4.7 has XSS in admin.comms.php via the rebanid parameter.

Why this priority

No elevated risk signals yet

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	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-79
Published	2017-04-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: sourcebans-pp project

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

Am I affected?

Timeline

2017-04-17 14:59 UTCPublished CVE record published
2026-06-17 01:25 UTCUpdated Record last modified

sourcebans-pp project sourcebans-pp DOWNGRADE

Affected: 1.5.4.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5.4.7

1. Check installed version

apt-cache policy sourcebans-pp || rpm -q sourcebans-pp || sourcebans-pp --version

2. No fixed release: DOWNGRADE to a release before 1.5.4.7 (Debian / Ubuntu)

apt-cache madison sourcebans-pp sudo apt install sourcebans-pp=<VERSION_BEFORE_1.5.4.7> sudo apt-mark hold sourcebans-pp

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

dnf --showduplicates list sourcebans-pp sudo dnf downgrade sourcebans-pp-<VERSION_BEFORE_1.5.4.7> sudo dnf versionlock add sourcebans-pp

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-2017-7891?

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

Is CVE-2017-7891 being exploited?

CVE-2017-7891 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-2017-7891 affect?

CVE-2017-7891 affects sourcebans-pp. Severity is medium (CVSS 6.1). sourcebans-pp (SourceBans++) 1.5.4.7 has XSS in admin.comms.php via the rebanid parameter.

How urgent is CVE-2017-7891?

Priority 34/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

References

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