CVE-2020-35460: common/InputStreamHelper.java in Packwood MPXJ before 8.3.5 allows directory traversal in the zip stream handl

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MEDIUM 5.3REMOTEUPGRADEUPGRADE

CVE-2020-35460 is a medium-severity flaw (CVSS 5.3) affecting mpxj, primavera unifier. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

common/InputStreamHelper.java in Packwood MPXJ before 8.3.5 allows directory traversal in the zip stream handler flow, leading to the writing of files to arbitrary locations.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-22
Published	2020-12-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mpxj · oracle

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

Am I affected?

Timeline

2020-12-14 23:15 UTCPublished CVE record published
2026-06-17 03:13 UTCUpdated Record last modified

mpxj mpxj UPGRADE

Affected: < 8.3.5

Fixed in: 8.3.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 8.3.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mpxj

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mpxj

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

oracle primavera unifier UPGRADE

Affected: >= 17.7 and <= 17.12 · 16.1 · 16.2 · 18.8 · 19.12 · 21.12

Fixed in: newer than 17.12

Safe to downgrade to: a release before 16.1

1. Check installed version

apt-cache policy primavera-unifier || rpm -q primavera-unifier || primavera-unifier --version

2. UPGRADE to newer than 17.12 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade primavera-unifier

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade primavera-unifier

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 16.1 (Debian / Ubuntu)

apt-cache madison primavera-unifier sudo apt install primavera-unifier=<VERSION_BEFORE_16.1> sudo apt-mark hold primavera-unifier

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list primavera-unifier sudo dnf downgrade primavera-unifier-<VERSION_BEFORE_16.1> sudo dnf versionlock add primavera-unifier

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-2020-35460?

mpxj: upgrade to 8.3.5; primavera unifier: upgrade to newer than 17.12. Exact commands for each OS are on this page.

Is CVE-2020-35460 being exploited?

CVE-2020-35460 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-2020-35460 affect?

CVE-2020-35460 affects mpxj, primavera unifier. Severity is medium (CVSS 5.3). common/InputStreamHelper.java in Packwood MPXJ before 8.3.5 allows directory traversal in the zip stream handler flow, leading to the writing of files to arbitrary locations.

How urgent is CVE-2020-35460?

Priority 43/100. Remotely exploitable, no login, no user action

Software pages

Java vulnerabilities

Related CVEs

CVE-2022-41954 LOW 3.3 UPGRADE MPXJ is an open source library to read and write project plans from a variety of file formats and databases
CVE-2020-25020 CRITICAL 9.8 UPGRADE UPGRADE MPXJ through 8.1.3 allows XXE attacks

References

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