CVE-2017-20104: A vulnerability was found in Simplessus 3.7.7

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HIGH 7.3REMOTEDOWNGRADE

CVE-2017-20104 is a high-severity flaw (CVSS 7.3) affecting simplessus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Simplessus 3.7.7. It has been declared as critical. This vulnerability affects unknown code of the component Cookie Handler. The manipulation of the argument UWA_SID leads to sql injection (Time). The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 3.8.3 is able to address this issue. It is recommended to upgrade the affected component.

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	7.3 (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-89
Published	2022-06-28
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: simplessus

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

Am I affected?

Timeline

2022-06-28 07:15 UTCPublished CVE record published
2026-06-17 01:15 UTCUpdated Record last modified

simplessus simplessus DOWNGRADE

Affected: 3.7.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.7.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.7.7 (Debian / Ubuntu)

apt-cache madison simplessus sudo apt install simplessus=<VERSION_BEFORE_3.7.7> sudo apt-mark hold simplessus

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

dnf --showduplicates list simplessus sudo dnf downgrade simplessus-<VERSION_BEFORE_3.7.7> sudo dnf versionlock add simplessus

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-2017-20104?

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

Is CVE-2017-20104 being exploited?

CVE-2017-20104 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-2017-20104 affect?

CVE-2017-20104 affects simplessus. Severity is high (CVSS 7.3). A vulnerability was found in Simplessus 3.7.7. It has been declared as critical. This vulnerability affects unknown code of the component Cookie Handler. The manipulation of the argument UWA_SID leads to sql injection (Time). The attack can

How urgent is CVE-2017-20104?

Priority 52/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2017-20105 MEDIUM 5.4 DOWNGRADE A vulnerability was found in Simplessus 3.7.7

References

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