CVE-2021-31671: pgsync before 0.6.7 is affected by Information Disclosure of sensitive information

Q: How do I fix CVE-2021-31671?

pgsync: upgrade to 0.6.7. Exact commands for each OS are on this page.

Q: Is CVE-2021-31671 being exploited?

CVE-2021-31671 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-31671 affect?

CVE-2021-31671 affects pgsync. Severity is high (CVSS 7.5). pgsync before 0.6.7 is affected by Information Disclosure of sensitive information. Syncing the schema with the --schema-first and --schema-only options is mishandled. For example, the sslmode connection parameter may be lost, which means t

Q: How urgent is CVE-2021-31671?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-31671 is a high-severity flaw (CVSS 7.5) affecting pgsync. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

pgsync before 0.6.7 is affected by Information Disclosure of sensitive information. Syncing the schema with the --schema-first and --schema-only options is mishandled. For example, the sslmode connection parameter may be lost, which means that SSL would not be used.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-319
Published	2021-04-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pgsync project

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

Am I affected?

Timeline

2021-04-27 03:15 UTCPublished CVE record published
2026-06-17 03:52 UTCUpdated Record last modified

pgsync project pgsync UPGRADE

Affected: < 0.6.7

Fixed in: 0.6.7

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.6.7 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pgsync

Note

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

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-2021-31671?

pgsync: upgrade to 0.6.7. Exact commands for each OS are on this page.

Is CVE-2021-31671 being exploited?

CVE-2021-31671 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-2021-31671 affect?

CVE-2021-31671 affects pgsync. Severity is high (CVSS 7.5). pgsync before 0.6.7 is affected by Information Disclosure of sensitive information. Syncing the schema with the --schema-first and --schema-only options is mishandled. For example, the sslmode connection parameter may be lost, which means t

How urgent is CVE-2021-31671?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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