FOSSBilling up to 0.7.x Session Identity Loader src/di.php session expiration

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$0-$5k0.00+

Summaryinfo

A vulnerability described as problematic has been identified in FOSSBilling up to 0.7.x. This issue affects some unknown processing of the file src/di.php of the component Session Identity Loader. Such manipulation leads to session expiration. This vulnerability is documented as CVE-2026-43918. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in FOSSBilling up to 0.7.x and classified as problematic. Affected by this issue is an unknown code block of the file src/di.php of the component Session Identity Loader. The manipulation with an unknown input leads to a session expiration vulnerability. Using CWE to declare the problem leads to CWE-613. According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization." Impacted is confidentiality. CVE summarizes:

FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.0, when a client or staff/admin account is suspended or marked inactive, existing authenticated sessions are not invalidated. The session identity loaders in src/di.php (loggedin_client and loggedin_admin) only reject sessions if the backing account record no longer exists in the database. They do not verify that the account's status is still active. This allows a suspended or deactivated user to retain full access until their session naturally expires. This issue has been fixed in version 0.8.0.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-43918 since 05/04/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available.

By approaching the search of inurl:src/di.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 0.8.0 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Session expiration
CWE: CWE-613
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Google Hack: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: FOSSBilling 0.8.0

Timelineinfo

05/04/2026 CVE reserved
07/06/2026 +63 days VulDB entry created
07/07/2026 +0 days Advisory disclosed
07/07/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-43918 (🔒)
GCVE (CVE): GCVE-0-2026-43918
GCVE (VulDB): GCVE-100-376556

Entryinfo

Created: 07/07/2026 00:09
Changes: 07/07/2026 00:09 (54)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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