CVE-2021-26474: Various Vembu products allow an attacker to execute a (non-blind) http-only Cross Site Request Forgery (Other

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HIGH 8.6REMOTEUPGRADEDOWNGRADE

CVE-2021-26474 is a high-severity flaw (CVSS 8.6) affecting bdr suite, offsite dr. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Various Vembu products allow an attacker to execute a (non-blind) http-only Cross Site Request Forgery (Other products or versions of products in this family may be affected too.)

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-352
Published	2021-06-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: vembu

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

Am I affected?

Timeline

2021-06-08 19:15 UTCPublished CVE record published
2026-06-17 03:43 UTCUpdated Record last modified

vembu bdr suite UPGRADE

Affected: < 4.2.0

Fixed in: 4.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bdr-suite || rpm -q bdr-suite || bdr-suite --version

2. UPGRADE to 4.2.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bdr-suite

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bdr-suite

Note

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

vembu offsite dr DOWNGRADE

Affected: 4.2.0 · 4.2.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.2.0

1. Check installed version

apt-cache policy offsite-dr || rpm -q offsite-dr || offsite-dr --version

2. No fixed release: DOWNGRADE to a release before 4.2.0 (Debian / Ubuntu)

apt-cache madison offsite-dr sudo apt install offsite-dr=<VERSION_BEFORE_4.2.0> sudo apt-mark hold offsite-dr

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

dnf --showduplicates list offsite-dr sudo dnf downgrade offsite-dr-<VERSION_BEFORE_4.2.0> sudo dnf versionlock add offsite-dr

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-2021-26474?

bdr suite: upgrade to 4.2.0; offsite dr: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-26474 being exploited?

CVE-2021-26474 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-2021-26474 affect?

CVE-2021-26474 affects bdr suite, offsite dr. Severity is high (CVSS 8.6). Various Vembu products allow an attacker to execute a (non-blind) http-only Cross Site Request Forgery (Other products or versions of products in this family may be affected too.)

How urgent is CVE-2021-26474?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-43458 HIGH 7.8 DOWNGRADE An Unquoted Service Path vulnerability exits in Vembu BDR 4.2.0.1 via a specially crafted file in the (1) hsfl
CVE-2021-26473 CRITICAL 9.8 UPGRADE UPGRADE In VembuBDR before 4.2.0.1 and VembuOffsiteDR before 4.2.0.1 the http API located at /sgwebservice_o.php actio
CVE-2021-26472 CRITICAL 10.0 UPGRADE UPGRADE In VembuBDR before 4.2.0.1 and VembuOffsiteDR before 4.2.0.1 installed on Windows, the http API located at /co
CVE-2021-26471 CRITICAL 9.8 UPGRADE UPGRADE In VembuBDR before 4.2.0.1 and VembuOffsiteDR before 4.2.0.1, the http API located at /sgwebservice_o.php acce

References

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