CVE-2019-19737: MFScripts YetiShare 3.5.2 through 4.5.3 does not set the SameSite flag on session cookies, allowing the cookie

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HIGH 8.8UPGRADE

CVE-2019-19737 is a high-severity flaw (CVSS 8.8) affecting yetishare. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MFScripts YetiShare 3.5.2 through 4.5.3 does not set the SameSite flag on session cookies, allowing the cookie to be sent in cross-site requests and potentially be used in cross-site request forgery attacks.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-352
Published	2019-12-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mfscripts

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

Am I affected?

Timeline

2019-12-30 17:15 UTCPublished CVE record published
2026-06-17 02:27 UTCUpdated Record last modified

mfscripts yetishare UPGRADE

Affected: >= 3.5.2 and <= 4.5.3

Fixed in: newer than 4.5.3

Safe to downgrade to: a release before 3.5.2

1. Check installed version

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

2. UPGRADE to newer than 4.5.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade yetishare

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 3.5.2 (Debian / Ubuntu)

apt-cache madison yetishare sudo apt install yetishare=<VERSION_BEFORE_3.5.2> sudo apt-mark hold yetishare

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

dnf --showduplicates list yetishare sudo dnf downgrade yetishare-<VERSION_BEFORE_3.5.2> sudo dnf versionlock add yetishare

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-2019-19737?

yetishare: upgrade to newer than 4.5.3. Exact commands for each OS are on this page.

Is CVE-2019-19737 being exploited?

CVE-2019-19737 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-2019-19737 affect?

CVE-2019-19737 affects yetishare. Severity is high (CVSS 8.8). MFScripts YetiShare 3.5.2 through 4.5.3 does not set the SameSite flag on session cookies, allowing the cookie to be sent in cross-site requests and potentially be used in cross-site request forgery attacks.

How urgent is CVE-2019-19737?

Priority 41/100. High severity

Related CVEs

CVE-2019-20062 CRITICAL 9.8 UPGRADE MFScripts YetiShare v3.5.2 through v4.5.4 might allow an attacker to reset a password by using a leaked hash (
CVE-2019-20061 HIGH 7.5 UPGRADE The user-introduction email in MFScripts YetiShare v3.5.2 through v4.5.4 may leak the (system-picked) password
CVE-2019-20060 HIGH 7.5 UPGRADE MFScripts YetiShare v3.5.2 through v4.5.4 places sensitive information in the Referer header
CVE-2019-20059 HIGH 8.8 UPGRADE payment_manage.ajax.php and various *_manage.ajax.php in MFScripts YetiShare 3.5.2 through 4.5.4 directly inse
CVE-2019-19806 MEDIUM 5.3 UPGRADE _account_forgot_password.ajax.php in MFScripts YetiShare 3.5.2 through 4.5.3 displays a message indicating whe

References

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