CVE-2021-42052: IPESA e-Flow 3.3.6 allows path traversal for reading any file within the web root directory via the lib/js/bui

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2021-42052 is a high-severity flaw (CVSS 7.5) affecting e-flow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IPESA e-Flow 3.3.6 allows path traversal for reading any file within the web root directory via the lib/js/build/STEResource.res path and the R query parameter.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-22
Published	2022-08-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ipesa

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

Am I affected?

Timeline

2022-08-16 23:15 UTCPublished CVE record published
2026-06-17 04:09 UTCUpdated Record last modified

ipesa e-flow DOWNGRADE

Affected: 3.3.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3.6

1. Check installed version

apt-cache policy e-flow || rpm -q e-flow || e-flow --version

2. No fixed release: DOWNGRADE to a release before 3.3.6 (Debian / Ubuntu)

apt-cache madison e-flow sudo apt install e-flow=<VERSION_BEFORE_3.3.6> sudo apt-mark hold e-flow

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

dnf --showduplicates list e-flow sudo dnf downgrade e-flow-<VERSION_BEFORE_3.3.6> sudo dnf versionlock add e-flow

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-2021-42052?

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

Is CVE-2021-42052 being exploited?

CVE-2021-42052 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-2021-42052 affect?

CVE-2021-42052 affects e-flow. Severity is high (CVSS 7.5). IPESA e-Flow 3.3.6 allows path traversal for reading any file within the web root directory via the lib/js/build/STEResource.res path and the R query parameter.

How urgent is CVE-2021-42052?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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