PayloadCMS 3.84.1 - Authenticated account lockout bypass through default unlock access

published 2026-06-26 4 mo ago modified 2026-09-04 2 mo ago also GHSA-jg8r-5jh2-v2xj , EUVD-2026-39799

cvss: 5.3; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits: 0; none known

An Improper Authorization vulnerability exists in PayloadCMS version 3.84.1 due to insufficient access control on the account unlock operation.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 4 mo ago (2026-06-26)

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

fluidattacks.com https://fluidattacks.com/es/advisories/stitches referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
CNA	4.0	5.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem	package	affected	fixed in
npm	payload	<=3.88.0	no fix listed

Affected products

PayloadCMS PayloadCMS

Classification

Weakness

CWE-307 Improper Restriction of Excessive Authentication Attempts

References

fluidattacks.com /es/advisories/stitches
third-party-advisory, exploit, web
github.com /payloadcms/payload
product, package
nvd.nist.gov /vuln/detail/CVE-2026-11779
advisory

Sources

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