CVE-2023-41471: Cross Site Scripting vulnerability in copyparty before 1.9.2 allows a local attacker to execute arbitrary code

Routine

HIGH 7.8DOWNGRADE

CVE-2023-41471 is a high-severity flaw (CVSS 7.8) affecting copyparty. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting vulnerability in copyparty before 1.9.2 allows a local attacker to execute arbitrary code via a crafted payload to the WEEKEND-PLANS function. NOTE: this is disputed because WEEKEND-PLANS is accessible only to actors who already have write access to the server, and they can more simply upload HTML files containing JavaScript.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-08-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 9001

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

Am I affected?

Timeline

2025-08-29 19:15 UTCPublished CVE record published
2026-06-17 06:22 UTCUpdated Record last modified

9001 copyparty DOWNGRADE

Affected: 1.9.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.9.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.9.1 (Debian / Ubuntu)

apt-cache madison copyparty sudo apt install copyparty=<VERSION_BEFORE_1.9.1> sudo apt-mark hold copyparty

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

dnf --showduplicates list copyparty sudo dnf downgrade copyparty-<VERSION_BEFORE_1.9.1> sudo dnf versionlock add copyparty

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-2023-41471?

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

Is CVE-2023-41471 being exploited?

CVE-2023-41471 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-2023-41471 affect?

CVE-2023-41471 affects copyparty. Severity is high (CVSS 7.8). Cross Site Scripting vulnerability in copyparty before 1.9.2 allows a local attacker to execute arbitrary code via a crafted payload to the WEEKEND-PLANS function. NOTE: this is disputed because WEEKEND-PLANS is accessible only to actors wh

How urgent is CVE-2023-41471?

Priority 37/100. High severity; Public exploit reference

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CVE-2025-58753 HIGH 7.5 UPGRADE Copyparty is a portable file server
CVE-2025-54796 HIGH 7.5 UPGRADE Copyparty is a portable file server
CVE-2025-54589 MEDIUM 6.3 UPGRADE Copyparty is a portable file server

References

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