CVE-2017-14535: trixbox 2.8.0.4 has OS command injection via shell metacharacters in the lang parameter to /maint/modules/home

This week

HIGH 8.8DOWNGRADE

CVE-2017-14535 is a high-severity flaw (CVSS 8.8) affecting trixbox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

trixbox 2.8.0.4 has OS command injection via shell metacharacters in the lang parameter to /maint/modules/home/index.php.

Why this priority

High severity
EPSS top 1%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	50.1% (top 1%)
CISA exploited list	No
Weakness	CWE-78
Published	2018-02-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: netfortris

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

Am I affected?

Timeline

2018-02-16 04:29 UTCPublished CVE record published
2026-06-17 01:06 UTCUpdated Record last modified

netfortris trixbox DOWNGRADE

Affected: 2.8.0.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.8.0.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.8.0.4 (Debian / Ubuntu)

apt-cache madison trixbox sudo apt install trixbox=<VERSION_BEFORE_2.8.0.4> sudo apt-mark hold trixbox

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

dnf --showduplicates list trixbox sudo dnf downgrade trixbox-<VERSION_BEFORE_2.8.0.4> sudo dnf versionlock add trixbox

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: Trixbox 2.8.0.4 - 'lang' Remote Code Execution (Unauthenticated)
Nuclei scan template: Trixbox - 2.8.0.4 OS Command Injection

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-2017-14535?

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

Is CVE-2017-14535 being exploited?

CVE-2017-14535 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-2017-14535 affect?

CVE-2017-14535 affects trixbox. Severity is high (CVSS 8.8). trixbox 2.8.0.4 has OS command injection via shell metacharacters in the lang parameter to /maint/modules/home/index.php.

How urgent is CVE-2017-14535?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2020-7351 HIGH 7.3 UPGRADE An OS Command Injection vulnerability in the endpoint_devicemap.php component of Fonality Trixbox Community Ed
CVE-2017-14537 MEDIUM 6.5 DOWNGRADE trixbox 2.8.0.4 has path traversal via the xajaxargs array parameter to /maint/index.php?packages or the lang
CVE-2017-14536 MEDIUM 5.4 DOWNGRADE trixbox 2.8.0.4 has XSS via the PATH_INFO to /maint/index.php or /user/includes/language/langChooser.php.
CVE-2014-5112 HIGH 7.5 MITIGATE maint/modules/home/index.php in Fonality trixbox allows remote attackers to execute arbitrary commands via she
CVE-2014-5111 MEDIUM 5.0 MITIGATE Multiple directory traversal vulnerabilities in Fonality trixbox allow remote attackers to read arbitrary file

References

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