What it is
CVE-2021-34621 is an unauthenticated ProfilePress 3.0 - 3.1.3 - Unauthenticated Privilege Escalation. A vulnerability in the user registration component found in the ~/src/Classes/RegistrationAuth.php file of the...
Vulnerability report
High confidence
Not in CISA KEV
CVE-2021-34621
ProfilePress 3.0 - 3.1.3 - Unauthenticated Privilege Escalation
ProfilePress / ProfilePress · 3.0.0 to <= 3.1.3
- Severity
- CVSS 9.8 · Critical
- Confidence
- High
- Exploit status
- PoC available
- EPSS
- 68.9%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is high.
Who is affected?
ProfilePress / ProfilePress 3.0.0 to <= 3.1.3.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
ProfilePress 3.0 - 3.1.3 - Unauthenticated Privilege Escalation
A vulnerability in the user registration component found in the ~/src/Classes/RegistrationAuth.php file of the ProfilePress WordPress plugin made it possible for users to register on sites as an administrator. This issue affects versions 3.0.0 - 3.1.3.
.
Vendor
Product
Affected
Status
properfraction
profilepress
Through 3.1.3
Affected
ProfilePress
ProfilePress
3.0.0 - 3.1.3
Affected
- Published
- 07 Jul 2021
- Exploitation Reported
- 28 Jun 2021
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- None
Tags
wordpress
php
nuclei_scanner
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2021-34621
- wordfence.com/blog/2021/06/easily-exploitable-critical-vul... wordfence.com · CVE Record https://www.wordfence.com/blog/2021/06/easily-exploitable-critical-vu...
- packetstormsecurity.com/files/163973/WordPress-ProfilePress-3.1.3-Pr... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/163973/WordPress-ProfilePress-3....
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Proof of concept available
GitHub
Public scanner or PoC coverage increases practical exploitability.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| Wordfence First | 2021-06-28 11:22 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
Nuclei template detected 25 Apr 2025.
View Nuclei template (opens in new tab)Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →Scanner Artifacts
Scanner and exploit-framework references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-34621.yaml | 25 Apr 2025 |
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
9.8
Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
68.9%
Weaknesses
All CVSS Scores
CVSS v3.1
9.8
Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
7.5
High
AV:N/AC:L/Au:N/C:P/I:P/A:P
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
WordPress ProfilePress 3.0.0-3.1.3 - Admin User Creation Weakness
nuclei · Created Unknown
Timeline
From disclosure to observed exploitation
-
Public PoC available
Public proof-of-concept code published
-
Nuclei template available
Scanner coverage available
-
CVE published
Vulnerability disclosed publicly
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2021-34621
Free JSON includes basic KEV fields{
"cve_id": "CVE-2021-34621",
"confidence": "High",
"cvss_score": 9.8,
"cvss_estimated": false,
"epss_score": 0.68862,
"exploit_status": {
"exploited_in_the_wild": false,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.