Reflected Cross-Site Scripting in GRR Resource Management Application
CVE-2026-58205

8.1HIGH

Key Information:

Vendor

Jeromedevome

Status
Grr
Vendor
CVE Published:
27 October 2026

What is CVE-2026-58205?

The GRR resource management and reservation application is susceptible to reflected cross-site scripting due to improper handling of the forcemaj parameter in maj.php. This allows attackers to construct malicious URLs that can execute arbitrary JavaScript in the victim's browser when accessed. As a result, this vulnerability can lead to serious security risks, including phishing attempts, redirection to harmful sites, cookie theft, and session hijacking, especially since the authentication cookie does not have the HttpOnly flag. This issue has been resolved in version 4.5.0.

Affected Version(s)

GRR < 4.5.0

References

https://github.com/JeromeDevome/GRR/security/advisories/G...
x_refsource_CONFIRM
https://github.com/JeromeDevome/GRR/commit/4ef77f91818215...
x_refsource_MISC
https://github.com/JeromeDevome/GRR/tree/v4.5.0
x_refsource_MISC

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.