CVE-2018-5988: SQL Injection exists in Flexible Poll 1.2 via the id parameter to mobile_preview.php or index.php.

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2018-5988 is a critical-severity flaw (CVSS 9.8) affecting flexible poll. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL Injection exists in Flexible Poll 1.2 via the id parameter to mobile_preview.php or index.php.

Why this priority

Critical severity
EPSS top 3%: very likely to be exploited
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	19.1% (top 3%)
CISA exploited list	No
Weakness	CWE-89
Published	2018-01-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: flexible poll project

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

Am I affected?

Timeline

2018-01-24 10:29 UTCPublished CVE record published
2026-06-17 02:01 UTCUpdated Record last modified

flexible poll project flexible poll DOWNGRADE

Affected: 1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2

1. Check installed version

apt-cache policy flexible-poll || rpm -q flexible-poll || flexible-poll --version

2. No fixed release: DOWNGRADE to a release before 1.2 (Debian / Ubuntu)

apt-cache madison flexible-poll sudo apt install flexible-poll=<VERSION_BEFORE_1.2> sudo apt-mark hold flexible-poll

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

dnf --showduplicates list flexible-poll sudo dnf downgrade flexible-poll-<VERSION_BEFORE_1.2> sudo dnf versionlock add flexible-poll

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: Flexible Poll 1.2 - 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-2018-5988?

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

Is CVE-2018-5988 being exploited?

CVE-2018-5988 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-2018-5988 affect?

CVE-2018-5988 affects flexible poll. Severity is critical (CVSS 9.8). SQL Injection exists in Flexible Poll 1.2 via the id parameter to mobile_preview.php or index.php.

How urgent is CVE-2018-5988?

Priority 69/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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