CVE-2021-45467
CriticalExploitedIn CWP (aka Control Web Panel or CentOS Web Panel) before 0.9.8.1107, an unauthenticated attacker can use %00 bytes to cause /user/loader.php to register an arbitrary API key, as demonstrated by a /user/loader.php?api=1&scripts= .%00./.%00./api/account_new_create&acc=guadaapi…
Published Dec 26, 2022 · Updated Apr 12, 2025
Key Facts
Patch immediately- CVE-2021-45467 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Webpanel (Control-Webpanel).
- It is exploited in the wild, listed in Industry KEV feed since May 15, 2024. No public exploit code is known.
- EPSS estimates a 71% probability of exploitation in the next 30 days.
- Fixed versions are available, including Webpanel 0.9.8.1107.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
71%
Higher than 99.3% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
None known
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Description
In CWP (aka Control Web Panel or CentOS Web Panel) before 0.9.8.1107, an unauthenticated attacker can use %00 bytes to cause /user/loader.php to register an arbitrary API key, as demonstrated by a /user/loader.php?api=1&scripts= .%00./.%00./api/account_new_create&acc=guadaapi URI. Any number of %00 instances can be used, e.g., .%00%00%00./.%00%00%00./api/account_new_create could also be used for the scripts parameter.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | May 15, 2024 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| WebpanelControl-Webpanel | See advisory | 0.9.8.1107 |
Patched Releases
Webpanel
0.9.8.1107
Timeline
Publicly disclosed
Dec 26, 2022
Added to Industry KEV feed
May 15, 2024
Last updated
Apr 12, 2025
Weakness Type
- CWE-862 Missing Authorization
References
FAQ
Common Questions.
In CWP (aka Control Web Panel or CentOS Web Panel) before 0.9.8.1107, an unauthenticated attacker can use %00 bytes to cause /user/loader.php to register an arbitrary API key, as demonstrated by a /user/loader.php?api=1&scripts= .%00./.%00./api/account_new_create&acc=guadaapi URI.
Affected: Webpanel (Control-Webpanel). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since May 15, 2024.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Webpanel 0.9.8.1107.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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