CVE-2025-55998: A cross-site scripting (XSS) vulnerability in Smart Search & Filter Shopify and BigCommerce apps allows a remo

Routine

HIGH 8.1DOWNGRADE

CVE-2025-55998 is a high-severity flaw (CVSS 8.1) affecting smart search and filter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A cross-site scripting (XSS) vulnerability in Smart Search & Filter Shopify and BigCommerce apps allows a remote attacker to execute arbitrary JavaScript in the web browser of a user, by including a malicious payload into several filter parameter

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-09-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mezereon

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

Am I affected?

Timeline

2025-09-08 15:15 UTCPublished CVE record published
2026-06-17 09:42 UTCUpdated Record last modified

mezereon smart search and filter DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy smart-search-and-filter || rpm -q smart-search-and-filter || smart-search-and-filter --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison smart-search-and-filter sudo apt install smart-search-and-filter=<VERSION_BEFORE_1.0> sudo apt-mark hold smart-search-and-filter

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

dnf --showduplicates list smart-search-and-filter sudo dnf downgrade smart-search-and-filter-<VERSION_BEFORE_1.0> sudo dnf versionlock add smart-search-and-filter

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-2025-55998?

smart search and filter: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-55998 being exploited?

CVE-2025-55998 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-2025-55998 affect?

CVE-2025-55998 affects smart search and filter. Severity is high (CVSS 8.1). A cross-site scripting (XSS) vulnerability in Smart Search & Filter Shopify and BigCommerce apps allows a remote attacker to execute arbitrary JavaScript in the web browser of a user, by including a malicious payload into several filter par

How urgent is CVE-2025-55998?

Priority 36/100. High severity

Software pages

Shopify vulnerabilities

References

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