Vulnerability Monitor

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CVE-2020-26407

A XSS vulnerability exists in Gitlab CE/EE from 12.4 before 13.4.7, 13.5 before 13.5.5, and 13.6 before 13.6.2 that allows an attacker to perform cross-site scripting to other users via importing a malicious project

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.5, indicating it can be exploited remotely over the network but requires specific conditions to be met though user interaction is required requiring only low-level privileges . The vulnerability impacts limited data confidentiality, limited integrity, and limited availability for affected systems. Impacting 1 product from gitlab organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-12-10T06:15:13.750

Last Modified

2024-11-21T05:19:52.393

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:S/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: SINGLE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

6.8

Impact Score

2.9

Weaknesses

Type: Primary
CWE-79

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	gitlab	gitlab	< 13.4.7	Yes
Application	gitlab	gitlab	< 13.4.7	Yes
Application	gitlab	gitlab	< 13.5.5	Yes
Application	gitlab	gitlab	< 13.5.5	Yes
Application	gitlab	gitlab	< 13.6.2	Yes
Application	gitlab	gitlab	< 13.6.2	Yes

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26407.json Third Party Advisory ([email protected])
https://gitlab.com/gitlab-org/gitlab/-/issues/212630 Broken Link ([email protected])
https://hackerone.com/reports/832117 Permissions Required, Third Party Advisory ([email protected])
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26407.json Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://gitlab.com/gitlab-org/gitlab/-/issues/212630 Broken Link (af854a3a-2127-422b-91ae-364da2661108)
https://hackerone.com/reports/832117 Permissions Required, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For gitlab's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.