F5 WebSafe Alert Server up to 4.2.6 input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in F5 WebSafe Alert Server up to 4.2.6. It has been rated as critical. This issue affects an unknown function. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

On F5 WebSafe Alert Server 1.0.0-4.2.6, a malicious, authenticated user can execute code on the alert server by using a maliciously crafted payload.

The bug was discovered 09/12/2018. The weakness was shared 09/13/2018 (Website). It is possible to read the advisory at support.f5.com. The identification of this vulnerability is CVE-2018-5545 since 01/11/2018. The exploitation is known to be easy. The attack may be initiated remotely. The successful exploitation requires a simple authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.

Applying a patch is able to eliminate this problem.

The entries VDB-137137 and VDB-137138 are related to this item.






CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍



VulDB Base Score: 🔍
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Class: Input validation

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Recommended: Patch
Status: 🔍

0-Day Time: 🔍


01/11/2018 🔍
09/12/2018 +243 days 🔍
09/13/2018 +0 days 🔍
09/13/2018 +0 days 🔍
09/13/2018 +0 days 🔍
09/14/2018 +1 days 🔍
05/16/2023 +1705 days 🔍


Vendor: f5.com

Advisory: K20226900
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-5545 (🔍)
SecurityFocus: 105344 - F5 WebSafe Alert Server CVE-2018-5545 Remote Code Execution Vulnerability

See also: 🔍


Created: 09/14/2018 07:16 AM
Updated: 05/16/2023 10:01 AM
Changes: 09/14/2018 07:16 AM (58), 03/23/2020 04:24 PM (4), 05/16/2023 10:01 AM (4)
Complete: 🔍
Cache ID: 34:92B:40


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