CVE-2026-33673: PrestaShop is an open source e-commerce web application

Routine

HIGH 7.6UPGRADE

CVE-2026-33673 is a high-severity flaw (CVSS 7.6) affecting prestashop. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PrestaShop is an open source e-commerce web application. Versions prior to 8.2.5 and 9.1.0 are vulnerable to stored Cross-Site Scripting (stored XSS) vulnerabilities in the BO. An attacker who can inject data into the database, via limited back-office access or a previously existing vulnerability, can exploit unprotected variables in back-office templates. Versions 8.2.5 and 9.1.0 contain a fix. No known workarounds are available.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.6 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: prestashop

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

Am I affected?

Timeline

2026-03-26 22:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

prestashop prestashop UPGRADE

Affected: < 8.2.5 · >= 9.0.0 and < 9.1.0

Fixed in: 8.2.5, 9.1.0

Safe to downgrade to: a release before 9.0.0

1. Check installed version

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

2. UPGRADE to 8.2.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade prestashop

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade prestashop

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 9.0.0 (Debian / Ubuntu)

apt-cache madison prestashop sudo apt install prestashop=<VERSION_BEFORE_9.0.0> sudo apt-mark hold prestashop

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list prestashop sudo dnf downgrade prestashop-<VERSION_BEFORE_9.0.0> sudo dnf versionlock add prestashop

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-2026-33673?

prestashop: upgrade to 8.2.5, 9.1.0. Exact commands for each OS are on this page.

Is CVE-2026-33673 being exploited?

CVE-2026-33673 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-2026-33673 affect?

CVE-2026-33673 affects prestashop. Severity is high (CVSS 7.6). PrestaShop is an open source e-commerce web application. Versions prior to 8.2.5 and 9.1.0 are vulnerable to stored Cross-Site Scripting (stored XSS) vulnerabilities in the BO. An attacker who can inject data into the database, via limited

How urgent is CVE-2026-33673?

Priority 32/100. High severity

Software pages

PrestaShop vulnerabilities

Related CVEs

CVE-2026-33674 LOW 2.0 UPGRADE PrestaShop is an open source e-commerce web application

References

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