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Vulnerability Details :

CVE-2026-44961

Summary
Assigner-hackerone
Assigner Org ID-36234546-b8fa-4601-9d6f-f4e334aa8ea1
Published At-23 Jun, 2026 | 16:14
Updated At-23 Jun, 2026 | 17:44
Rejected At-
Credits

The XML‑RPC API addUser method has a validation bypass introduced in the fix for CVE‑2025‑55129. As a result, API users could create usernames that enabled impersonation or stored XSS attacks. Proper validation has been added where it was missing.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:hackerone
Assigner Org ID:36234546-b8fa-4601-9d6f-f4e334aa8ea1
Published At:23 Jun, 2026 | 16:14
Updated At:23 Jun, 2026 | 17:44
Rejected At:
▼CVE Numbering Authority (CNA)

The XML‑RPC API addUser method has a validation bypass introduced in the fix for CVE‑2025‑55129. As a result, API users could create usernames that enabled impersonation or stored XSS attacks. Proper validation has been added where it was missing.

Affected Products
Vendor
Revive
Product
Adserver
Default Status
unaffected
Versions
Affected
  • From 0 through 6.0.6 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-287CWE-287 Improper Authentication - Generic
Type: CWE
CWE ID: CWE-287
Description: CWE-287 Improper Authentication - Generic
Metrics
VersionBase scoreBase severityVector
3.00.0NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
Version: 3.0
Base score: 0.0
Base severity: NONE
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

reporter
barcrange (3l4)
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://hackerone.com/reports/3680090
N/A
Hyperlink: https://hackerone.com/reports/3680090
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:support@hackerone.com
Published At:23 Jun, 2026 | 17:17
Updated At:23 Jun, 2026 | 18:17

The XML‑RPC API addUser method has a validation bypass introduced in the fix for CVE‑2025‑55129. As a result, API users could create usernames that enabled impersonation or stored XSS attacks. Proper validation has been added where it was missing.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.00.0NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
N/A
Type: Secondary
Version: 3.0
Base score: 0.0
Base severity: NONE
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-287Secondarysupport@hackerone.com
CWE ID: CWE-287
Type: Secondary
Source: support@hackerone.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://hackerone.com/reports/3680090support@hackerone.com
N/A
Hyperlink: https://hackerone.com/reports/3680090
Source: support@hackerone.com
Resource: N/A

Change History

0
Information is not available yet

Similar CVEs

3Records found

CVE-2026-44956
Matching Score-8
Assigner-HackerOne
ShareView Details
Matching Score-8
Assigner-HackerOne
CVSS Score-Not Assigned
EPSS-Not Assigned
Published-23 Jun, 2026 | 16:14
Updated-23 Jun, 2026 | 18:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Low‑privileged users could use their Full Name as a vector for a stored XSS attack. The name is included in system‑generated emails, whose content is stored in the details field of the userlog table. An admin user viewing the email content through userlog-details.php would have any malicious JavaScript payload executed due to missing output sanitisation. Proper escaping has been added to the userlog details output.

Action-Not Available
Vendor-Revive
Product-Adserver
CWE ID-CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE-2026-44960
Matching Score-8
Assigner-HackerOne
ShareView Details
Matching Score-8
Assigner-HackerOne
CVSS Score-Not Assigned
EPSS-Not Assigned
Published-23 Jun, 2026 | 16:14
Updated-23 Jun, 2026 | 18:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A stored XSS can be exploited by leveraging the usernames as an attack vector. When an admin user viewed the audit log details for affected entries, any malicious JavaScript payload embedded in the username would be executed due to missing output sanitisation. Proper escaping has been added to the audit log details output.

Action-Not Available
Vendor-Revive
Product-Adserver
CWE ID-CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE-2026-34917
Matching Score-6
Assigner-HackerOne
ShareView Details
Matching Score-6
Assigner-HackerOne
CVSS Score-4.3||MEDIUM
EPSS-Not Assigned
Published-23 Jun, 2026 | 16:14
Updated-23 Jun, 2026 | 18:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Low‑privileged session IDs generated for the web admin console could be reused in the XML‑RPC API, whose authentication is normally restricted to admin users. An attacker could leverage this to gain unauthorised access and exploit API‑level vulnerabilities. The session context (web/API) is now recorded along with other session data, preventing session IDs from being used interchangeably.

Action-Not Available
Vendor-Revive
Product-Adserver
CWE ID-CWE-287
Improper Authentication
Details not found