CVE-2017-11562: A Session Fixation Vulnerability exists in the MT4 Networks SenhaSegura Web Application 2.2.23.8 via login_if.

This month

HIGH 8.8DOWNGRADE

CVE-2017-11562 is a high-severity flaw (CVSS 8.8) affecting senhasegura. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Session Fixation Vulnerability exists in the MT4 Networks SenhaSegura Web Application 2.2.23.8 via login_if.php.

Why this priority

High severity

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-384
Published	2017-12-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mt4

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

Am I affected?

Timeline

2017-12-19 02:29 UTCPublished CVE record published
2026-06-17 01:02 UTCUpdated Record last modified

mt4 senhasegura DOWNGRADE

Affected: 2.2.23.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2.23.8

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.2.23.8 (Debian / Ubuntu)

apt-cache madison senhasegura sudo apt install senhasegura=<VERSION_BEFORE_2.2.23.8> sudo apt-mark hold senhasegura

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

dnf --showduplicates list senhasegura sudo dnf downgrade senhasegura-<VERSION_BEFORE_2.2.23.8> sudo dnf versionlock add senhasegura

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-2017-11562?

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

Is CVE-2017-11562 being exploited?

CVE-2017-11562 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-2017-11562 affect?

CVE-2017-11562 affects senhasegura. Severity is high (CVSS 8.8). A Session Fixation Vulnerability exists in the MT4 Networks SenhaSegura Web Application 2.2.23.8 via login_if.php.

How urgent is CVE-2017-11562?

Priority 47/100. High severity

Software pages

PHP vulnerabilities

References

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