CVE-2025-70458: A DOM-based Cross-Site Scripting (XSS) vulnerability exists in the DomainCheckerApp class within domain/script

Routine

MEDIUM 5.4DOWNGRADE

CVE-2025-70458 is a medium-severity flaw (CVSS 5.4) affecting domain availability checker. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A DOM-based Cross-Site Scripting (XSS) vulnerability exists in the DomainCheckerApp class within domain/script.js of Sourcecodester Domain Availability Checker v1.0. The vulnerability occurs because the application improperly handles user-supplied data in the createResultElement method by using the unsafe innerHTML property to render domain search results.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-01-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: remyandrade

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

Am I affected?

Timeline

2026-01-23 22:16 UTCPublished CVE record published
2026-06-17 10:03 UTCUpdated Record last modified

remyandrade domain availability checker 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 domain-availability-checker || rpm -q domain-availability-checker || domain-availability-checker --version

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

apt-cache madison domain-availability-checker sudo apt install domain-availability-checker=<VERSION_BEFORE_1.0> sudo apt-mark hold domain-availability-checker

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

dnf --showduplicates list domain-availability-checker sudo dnf downgrade domain-availability-checker-<VERSION_BEFORE_1.0> sudo dnf versionlock add domain-availability-checker

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-2025-70458?

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

Is CVE-2025-70458 being exploited?

CVE-2025-70458 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-2025-70458 affect?

CVE-2025-70458 affects domain availability checker. Severity is medium (CVSS 5.4). A DOM-based Cross-Site Scripting (XSS) vulnerability exists in the DomainCheckerApp class within domain/script.js of Sourcecodester Domain Availability Checker v1.0. The vulnerability occurs because the application improperly handles user-s

How urgent is CVE-2025-70458?

Priority 27/100. Public exploit reference

References

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