What it is
CVE-2025-5821 is an unauthenticated vulnerability affecting Case-Themes Case Theme User. The Case Theme User plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 1.0.3....
Vulnerability report
Exploited in the wild
High confidence
Not in CISA KEV
CVE-2025-5821
Case Theme User <= 1.0.3 Authentication Bypass
Case-Themes / Case Theme User · * to <= 1.0.3
- Severity
- CVSS 9.8 · Critical
- Confidence
- High
- Exploit status
- Exploited in the wild
- EPSS
- 0.7%
- 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?
Case-Themes / Case Theme User * to <= 1.0.3.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Case Theme User <= 1.0.3 Authentication Bypass
The Case Theme User plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 1.0.3. This is due to the plugin not properly logging a user in with the data that was previously verified through the facebook_ajax_login_callback().
This makes it possible for unauthenticated attackers to log in as administrative users, as long as they have an existing account on the site, and access to the administrative user's email.
Vendor
Product
Affected
Status
Case-Themes
Case Theme User
Through 1.0.3
Affected
- Published
- 23 Aug 2025
- Exploitation Reported
- 11 Jun 2026
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- None
Tags
wordpress
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2025-5821
- wordfence.com/threat-intel/vulnerabilities/id/3ce95a04-11b... wordfence.com · CVE Record https://www.wordfence.com/threat-intel/vulnerabilities/id/3ce95a04-11...
- themeforest.net/item/consultio-consulting-business-wordpress... themeforest.net · CVE Record https://themeforest.net/item/consultio-consulting-business-wordpress/...
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.
Exploited in the wild
Daily CyberSecurity
Independent exploitation attestation added to the KEV Intelligence record.
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 |
|---|---|
| Daily CyberSecurity First | 2026-06-11 00:20 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
No scanner integrations recorded yet.
Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
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
0.7%
Recent mention · Daily CyberSecurity
Critical UpdraftPlus CVE-2026-10795 Exploit Targets Millions
Cybersecurity experts recently identified a massive threat to WordPress websites. Specifically, hackers are actively exploiting a critical UpdraftPlus The post Critical UpdraftPlus CVE-2026-10795 Exploit Targets Millions appeared first on Daily CyberSecurity. Related...
Read full advisoryTimeline
From disclosure to observed exploitation
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
CVE published
Vulnerability disclosed publicly
-
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-2025-5821
Free JSON includes basic KEV fields{
"cve_id": "CVE-2025-5821",
"confidence": "High",
"cvss_score": 9.8,
"cvss_estimated": false,
"epss_score": 0.00741,
"exploit_status": {
"exploited_in_the_wild": true,
"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.