CVE-2025-66845: A reflected Cross-Site Scripting (XSS) vulnerability has been identified in TechStore version 1.0

Routine

MEDIUM 6.1DOWNGRADE

CVE-2025-66845 is a medium-severity flaw (CVSS 6.1) affecting techstore. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A reflected Cross-Site Scripting (XSS) vulnerability has been identified in TechStore version 1.0. The user_name endpoint reflects the id query parameter directly into the HTML response without output encoding or sanitization, allowing execution of arbitrary JavaScript code in a victim’s browser.

Why this priority

No elevated risk signals yet

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	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-12-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: nooncarlett

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

Am I affected?

Timeline

2025-12-23 14:16 UTCPublished CVE record published
2026-06-17 09:57 UTCUpdated Record last modified

nooncarlett techstore 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 techstore || rpm -q techstore || techstore --version

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

apt-cache madison techstore sudo apt install techstore=<VERSION_BEFORE_1.0> sudo apt-mark hold techstore

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

dnf --showduplicates list techstore sudo dnf downgrade techstore-<VERSION_BEFORE_1.0> sudo dnf versionlock add techstore

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-2025-66845?

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

Is CVE-2025-66845 being exploited?

CVE-2025-66845 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-2025-66845 affect?

CVE-2025-66845 affects techstore. Severity is medium (CVSS 6.1). A reflected Cross-Site Scripting (XSS) vulnerability has been identified in TechStore version 1.0. The user_name endpoint reflects the id query parameter directly into the HTML response without output encoding or sanitization, allowing exec

How urgent is CVE-2025-66845?

Priority 24/100. No elevated risk signals yet.

Related CVEs

CVE-2025-63544 MEDIUM 6.1 DOWNGRADE TechStore 1.0 is vulnerable to Cross Site Scripting (XSS) in /order_notes via the id parameter.
CVE-2025-63543 MEDIUM 6.1 DOWNGRADE TechStore 1.0 is vulnerable to Cross Site Scripting (XSS) in the /search_results endpoint via the q parameter.

References

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