A predictable seed vulnerability exists in the password reset functionality of Epignosis EfrontPro 5.2.21.

published 2021-03-03 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-20995

cvss: 9.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits: 0; none known

A predictable seed vulnerability exists in the password reset functionality of Epignosis EfrontPro 5.2.21. By predicting the seed it is possible to generate the correct password reset 1-time token. An attacker can visit the password reset supplying the password reset token to reset the password of an account of their choice.

Exploit prediction

1.07% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

n/a Epignosis

Classification

Weakness

CWE-337 Predictable Seed in Pseudo-Random Number Generator (PRNG)
CWE-335 Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)

References

talosintelligence.com /vulnerability_reports/TALOS-2020-1221
third-party-advisory

Sources

CVE List CVE-2020-28597
NVD CVE-2020-28597

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary