CVE-2017-17871: The "JEXTN Question And Answer" extension 3.1.0 for Joomla! has SQL Injection via the an parameter in a view=t

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2017-17871 is a critical-severity flaw (CVSS 9.8) affecting jextn question and answer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The "JEXTN Question And Answer" extension 3.1.0 for Joomla! has SQL Injection via the an parameter in a view=tags action, or the ques-srch parameter.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.7% (top 14%)
CISA exploited list	No
Weakness	CWE-89
Published	2017-12-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jextn

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

Am I affected?

Timeline

2017-12-27 17:08 UTCPublished CVE record published
2026-06-17 01:11 UTCUpdated Record last modified

jextn jextn question and answer DOWNGRADE

Affected: 3.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1.0

1. Check installed version

apt-cache policy jextn-question-and-answer || rpm -q jextn-question-and-answer || jextn-question-and-answer --version

2. No fixed release: DOWNGRADE to a release before 3.1.0 (Debian / Ubuntu)

apt-cache madison jextn-question-and-answer sudo apt install jextn-question-and-answer=<VERSION_BEFORE_3.1.0> sudo apt-mark hold jextn-question-and-answer

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

dnf --showduplicates list jextn-question-and-answer sudo dnf downgrade jextn-question-and-answer-<VERSION_BEFORE_3.1.0> sudo dnf versionlock add jextn-question-and-answer

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: Joomla! Component JEXTN Question And Answer 3.1.0 - SQL 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-2017-17871?

jextn question and answer: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-17871 being exploited?

CVE-2017-17871 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-2017-17871 affect?

CVE-2017-17871 affects jextn question and answer. Severity is critical (CVSS 9.8). The "JEXTN Question And Answer" extension 3.1.0 for Joomla! has SQL Injection via the an parameter in a view=tags action, or the ques-srch parameter.

How urgent is CVE-2017-17871?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Joomla vulnerabilities

References

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