CVE-2025-8356: In Xerox FreeFlow Core version 8.0.4, an attacker can exploit a Path Traversal vulnerability to access unautho

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2025-8356 is a critical-severity flaw (CVSS 9.8) affecting freeflow core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Xerox FreeFlow Core version 8.0.4, an attacker can exploit a Path Traversal vulnerability to access unauthorized files on the server. This can lead to Remote Code Execution (RCE), allowing the attacker to run arbitrary commands on the system.

Why this priority

Critical severity
EPSS top 3%: very likely to be exploited
CISA SSVC: public proof of concept
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	19.1% (top 3%)
CISA exploited list	No
Weakness	CWE-22, CWE-94
Published	2025-08-08
Last modified	2026-06-17

Publisher (CNA): Xerox · Vendor: xerox

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

Am I affected?

Timeline

2025-08-08 16:15 UTCPublished CVE record published
2026-06-17 10:06 UTCUpdated Record last modified

xerox freeflow core DOWNGRADE

Affected: 8.0.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0.4

1. Check installed version

apt-cache policy freeflow-core || rpm -q freeflow-core || freeflow-core --version

2. No fixed release: DOWNGRADE to a release before 8.0.4 (Debian / Ubuntu)

apt-cache madison freeflow-core sudo apt install freeflow-core=<VERSION_BEFORE_8.0.4> sudo apt-mark hold freeflow-core

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

dnf --showduplicates list freeflow-core sudo dnf downgrade freeflow-core-<VERSION_BEFORE_8.0.4> sudo dnf versionlock add freeflow-core

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora ELN · fips-provider-next · FIXED · 1.5.3-3.eln159 · FEDORA-2026-3ce99ec7df · source

sudo dnf upgrade --advisory=FEDORA-2026-3ce99ec7df

Fedora 46 · rubygem-webmock · FIXED · 3.26.1-3.fc46 · FEDORA-2026-bb57b4d095 · source

sudo dnf upgrade --advisory=FEDORA-2026-bb57b4d095

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: horizon3.ai/attack-research/attack-blogs/from-support-ticket-to-zero-day/

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-2025-8356?

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

Is CVE-2025-8356 being exploited?

CVE-2025-8356 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-2025-8356 affect?

CVE-2025-8356 affects freeflow core. Severity is critical (CVSS 9.8). In Xerox FreeFlow Core version 8.0.4, an attacker can exploit a Path Traversal vulnerability to access unauthorized files on the server. This can lead to Remote Code Execution (RCE), allowing the attacker to run arbitrary commands on the sy

How urgent is CVE-2025-8356?

Priority 70/100. Critical severity; EPSS top 3%: very likely to be exploited; CISA SSVC: public proof of concept; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

Xerox vulnerabilities

Related CVEs

CVE-2026-2252 HIGH 7.5 UPGRADE An XML External Entity (XXE) vulnerability allows malicious user to perform Server-Side Request Forgery (SSRF)
CVE-2026-2251 CRITICAL 9.8 UPGRADE Improper limitation of a pathname to a restricted directory (Path Traversal) vulnerability in Xerox FreeFlow C
CVE-2025-8355 HIGH 7.5 DOWNGRADE In Xerox FreeFlow Core version 8.0.4, improper handling of XML input allows injection of external entities
CVE-2024-47559 HIGH 7.6 DOWNGRADE Authenticated RCE via Path Traversal
CVE-2024-47558 HIGH 7.6 DOWNGRADE Authenticated RCE via Path Traversal

References

← Back to latest CVEs