CVE-2018-18075: WikidForum 2.20 has SQL Injection via the rpc.php parent_post_id or num_records parameter, or the index.php?ac

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2018-18075 is a critical-severity flaw (CVSS 9.8) affecting wikidforum. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WikidForum 2.20 has SQL Injection via the rpc.php parent_post_id or num_records parameter, or the index.php?action=search select_sort 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	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-89
Published	2018-10-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: wikidforum project

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

Am I affected?

Timeline

2018-10-09 17:29 UTCPublished CVE record published
2026-06-17 01:46 UTCUpdated Record last modified

wikidforum project wikidforum DOWNGRADE

Affected: 2.20

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.20

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.20 (Debian / Ubuntu)

apt-cache madison wikidforum sudo apt install wikidforum=<VERSION_BEFORE_2.20> sudo apt-mark hold wikidforum

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

dnf --showduplicates list wikidforum sudo dnf downgrade wikidforum-<VERSION_BEFORE_2.20> sudo dnf versionlock add wikidforum

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-2018-18075?

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

Is CVE-2018-18075 being exploited?

CVE-2018-18075 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-2018-18075 affect?

CVE-2018-18075 affects wikidforum. Severity is critical (CVSS 9.8). WikidForum 2.20 has SQL Injection via the rpc.php parent_post_id or num_records parameter, or the index.php?action=search select_sort parameter.

How urgent is CVE-2018-18075?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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