CVE-2017-12971: Cross-site scripting (XSS) vulnerability in Apache2Triad 1.5.4 allows remote attackers to inject arbitrary web

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MEDIUM 6.1WATCHLISTDOWNGRADE

CVE-2017-12971 is a medium-severity flaw (CVSS 6.1) affecting apache2triad. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in Apache2Triad 1.5.4 allows remote attackers to inject arbitrary web script or HTML via the account parameter to phpsftpd/users.php.

Why this priority

Public exploit reference
On your watchlist

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	2.6% (top 14%)
CISA exploited list	No
Weakness	CWE-79
Published	2017-08-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: apache2triad

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

Am I affected?

Timeline

2017-08-23 16:29 UTCPublished CVE record published
2026-06-17 01:04 UTCUpdated Record last modified

apache2triad apache2triad DOWNGRADE

Affected: 1.5.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5.4

1. Check installed version

apt-cache policy apache2triad || rpm -q apache2triad || apache2triad --version

2. No fixed release: DOWNGRADE to a release before 1.5.4 (Debian / Ubuntu)

apt-cache madison apache2triad sudo apt install apache2triad=<VERSION_BEFORE_1.5.4> sudo apt-mark hold apache2triad

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

dnf --showduplicates list apache2triad sudo dnf downgrade apache2triad-<VERSION_BEFORE_1.5.4> sudo dnf versionlock add apache2triad

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: Apache2Triad 1.5.4 - Multiple Vulnerabilities

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-2017-12971?

apache2triad: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-12971 being exploited?

CVE-2017-12971 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-2017-12971 affect?

CVE-2017-12971 affects apache2triad. Severity is medium (CVSS 6.1). Cross-site scripting (XSS) vulnerability in Apache2Triad 1.5.4 allows remote attackers to inject arbitrary web script or HTML via the account parameter to phpsftpd/users.php.

How urgent is CVE-2017-12971?

Priority 53/100. Public exploit reference; On your watchlist

Software pages

PHP vulnerabilities

Related CVEs

CVE-2017-12970 HIGH 8.8 DOWNGRADE Cross-site request forgery (CSRF) vulnerability in Apache2Triad 1.5.4 allows remote attackers to hijack the au
CVE-2017-12965 CRITICAL 9.8 DOWNGRADE Session fixation vulnerability in Apache2Triad 1.5.4 allows remote attackers to hijack web sessions via the PH

References

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