CVE-2017-20164: A vulnerability was found in Symbiote Seed up to 6.0.2

Routine

MEDIUM 6.3UPGRADE

CVE-2017-20164 is a medium-severity flaw (CVSS 6.3) affecting seed. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Symbiote Seed up to 6.0.2. It has been classified as critical. Affected is the function onBeforeSecurityLogin of the file code/extensions/SecurityLoginExtension.php of the component Login. The manipulation of the argument URL leads to open redirect. It is possible to launch the attack remotely. Upgrading to version 6.0.3 is able to address this issue. The patch is identified as b065ebd82da53009d273aa7e989191f701485244

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-601
Published	2023-01-07
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: symbiote

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

Am I affected?

Timeline

2023-01-07 20:15 UTCPublished CVE record published
2026-06-17 01:15 UTCUpdated Record last modified

symbiote seed UPGRADE

Affected: >= 6.0.0 and < 6.0.3

Fixed in: 6.0.3

Safe to downgrade to: a release before 6.0.0

1. Check installed version

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

2. UPGRADE to 6.0.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade seed

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 6.0.0 (Debian / Ubuntu)

apt-cache madison seed sudo apt install seed=<VERSION_BEFORE_6.0.0> sudo apt-mark hold seed

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

dnf --showduplicates list seed sudo dnf downgrade seed-<VERSION_BEFORE_6.0.0> sudo dnf versionlock add seed

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-2017-20164?

seed: upgrade to 6.0.3. Exact commands for each OS are on this page.

Is CVE-2017-20164 being exploited?

CVE-2017-20164 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-2017-20164 affect?

CVE-2017-20164 affects seed. Severity is medium (CVSS 6.3). A vulnerability was found in Symbiote Seed up to 6.0.2. It has been classified as critical. Affected is the function onBeforeSecurityLogin of the file code/extensions/SecurityLoginExtension.php of the component Login. The manipulation of th

How urgent is CVE-2017-20164?

Priority 33/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

References

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