CVE-2018-15562: CMS ISWEB 3.5.3 has XSS via the ordineRis, sezioneRicerca, or oggettiRicerca parameter to index.php.

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MEDIUM 6.1DOWNGRADE

CVE-2018-15562 is a medium-severity flaw (CVSS 6.1) 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 has XSS via the ordineRis, sezioneRicerca, or oggettiRicerca parameter to index.php.

Why this priority

Public exploit reference

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	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-08-29
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

2018-08-29 19:29 UTCPublished CVE record published
2026-06-17 01:42 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.

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-2018-15562?

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

Is CVE-2018-15562 being exploited?

CVE-2018-15562 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-2018-15562 affect?

CVE-2018-15562 affects isweb. Severity is medium (CVSS 6.1). CMS ISWEB 3.5.3 has XSS via the ordineRis, sezioneRicerca, or oggettiRicerca parameter to index.php.

How urgent is CVE-2018-15562?

Priority 42/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

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
CVE-2018-14956 CRITICAL 9.8 DOWNGRADE CMS ISWEB 3.5.3 is vulnerable to multiple SQL injection flaws

References

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