How severe is CVE-2019-19735?

CVE-2019-19735 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2019-19735 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-19735?

CVE-2019-19735 affects Mfscripts Yetishare. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-19735?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-19735 published?

CVE-2019-19735 was published on 2019-12-30 and last updated on 2026-06-17.

CVE-2019-19735

CVE-2019-19735 is a critical-severity vulnerability in Mfscripts Yetishare with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-916.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-916
Affected product: Mfscripts Yetishare
Published: 2019-12-30
Last modified: 2026-06-17

Description

class.userpeer.php in MFScripts YetiShare 3.5.2 through 4.5.3 uses an insecure method of creating password reset hashes (based only on microtime), which allows an attacker to guess the hash and set the password within a few hours by bruteforcing.

Frequently asked questions

What is CVE-2019-19735?: class.userpeer.php in MFScripts YetiShare 3.5.2 through 4.5.3 uses an insecure method of creating password reset hashes (based only on microtime), which allows an attacker to guess the hash and set the password within a few hours by bruteforcing.
How severe is CVE-2019-19735?: CVE-2019-19735 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2019-19735 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-19735?: CVE-2019-19735 affects Mfscripts Yetishare. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-19735?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-19735 published?: CVE-2019-19735 was published on 2019-12-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mfscripts:yetishare:*:*:*:*:*:*:*:*

More vulnerabilities in Mfscripts Yetishare

CVE-2019-20062 — Critical (CVSS 9.8): MFScripts YetiShare v3.5.2 through v4.5.4 might allow an attacker to reset a password by using a leaked hash (the hash…
CVE-2019-20059 — High (CVSS 8.8): payment_manage.ajax.php and various *_manage.ajax.php in MFScripts YetiShare 3.5.2 through 4.5.4 directly insert values…
CVE-2019-19737 — 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…
CVE-2019-19734 — High (CVSS 8.8): _account_move_file_in_folder.ajax.php in MFScripts YetiShare 3.5.2 directly inserts values from the fileIds parameter…
CVE-2019-20061 — High (CVSS 7.5): The user-introduction email in MFScripts YetiShare v3.5.2 through v4.5.4 may leak the (system-picked) password if this…
CVE-2019-20060 — High (CVSS 7.5): MFScripts YetiShare v3.5.2 through v4.5.4 places sensitive information in the Referer header. If this leaks, then third…

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