CVE-2018-14956: CMS ISWEB 3.5.3 is vulnerable to multiple SQL injection flaws

This week

CRITICAL 9.8REMOTEWATCHLISTDOWNGRADE

CVE-2018-14956 is a critical-severity flaw (CVSS 9.8) affecting isweb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CMS ISWEB 3.5.3 is vulnerable to multiple SQL injection flaws. An attacker can inject malicious queries into the application and obtain sensitive information.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-89
Published	2018-09-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: isweb

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

Am I affected?

Timeline

2018-09-28 00:29 UTCPublished CVE record published
2026-06-17 01:41 UTCUpdated Record last modified

isweb isweb DOWNGRADE

Affected: 3.5.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.5.3 (Debian / Ubuntu)

apt-cache madison isweb sudo apt install isweb=<VERSION_BEFORE_3.5.3> sudo apt-mark hold isweb

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

dnf --showduplicates list isweb sudo dnf downgrade isweb-<VERSION_BEFORE_3.5.3> sudo dnf versionlock add isweb

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · copyparty · FIXED · 1.20.26-1.fc46 · FEDORA-2026-8fbe18458e · source

sudo dnf upgrade --advisory=FEDORA-2026-8fbe18458e

Fedora ELN · man-pages · FIXED · 6.20-1.eln159 · FEDORA-2026-f1f5fb11b4 · source

sudo dnf upgrade --advisory=FEDORA-2026-f1f5fb11b4

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: cxsecurity.com/issue/WLB-2018090249

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-2018-14956?

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

Is CVE-2018-14956 being exploited?

CVE-2018-14956 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-2018-14956 affect?

CVE-2018-14956 affects isweb. Severity is critical (CVSS 9.8). CMS ISWEB 3.5.3 is vulnerable to multiple SQL injection flaws. An attacker can inject malicious queries into the application and obtain sensitive information.

How urgent is CVE-2018-14956?

Priority 71/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2018-15562 MEDIUM 6.1 DOWNGRADE CMS ISWEB 3.5.3 has XSS via the ordineRis, sezioneRicerca, or oggettiRicerca parameter to index.php.
CVE-2018-14957 CRITICAL 9.8 DOWNGRADE CMS ISWEB 3.5.3 is vulnerable to directory traversal and local file download, as demonstrated by moduli/downlo

References

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