joomlaeventmanager.net Event Manager Extension 1.0.0-5.0.0 Administrator Source Model unrestricted upload

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.5$0-$5k1.24

Summaryinfo

A vulnerability classified as problematic was found in joomlaeventmanager.net Event Manager Extension 1.0.0-5.0.0. Impacted is an unknown function of the component Administrator Source Model. The manipulation results in unrestricted upload. This vulnerability is known as CVE-2026-77991. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in joomlaeventmanager.net Event Manager Extension 1.0.0-5.0.0. It has been classified as problematic. Affected is an unknown function of the component Administrator Source Model. The manipulation with an unknown input leads to a unrestricted upload vulnerability. CWE is classifying the issue as CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Joomla Extension - joomlaeventmanager.net - Privileged remote code execution in Joomla Event Manager < 5.0.1 - The administrator source model allows to write dangerous file type incl. PHP, leading to remote code execution.

The advisory is shared for download at joomlaeventmanager.net. This vulnerability is traded as CVE-2026-77991 since 08/21/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation requires an enhanced level of successful authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1608.002.

Upgrading to version 5.0.1 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
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: Unrestricted upload
CWE: CWE-434 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

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

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Event Manager Extension 5.0.1

Timelineinfo

08/21/2026 CVE reserved
08/27/2026 +6 days Advisory disclosed
08/27/2026 +0 days VulDB entry created
08/27/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: joomlaeventmanager.net
Status: Confirmed

CVE: CVE-2026-77991 (🔒)
GCVE (CVE): GCVE-0-2026-77991
GCVE (VulDB): GCVE-100-396060

Entryinfo

Created: 08/27/2026 08:24
Changes: 08/27/2026 08:24 (67)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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