Stored XSS via unescaped forwarding header
Published Aug 16, 2021 · Updated Aug 4, 2024
Stored XSS in helloxz imgURL 2.31 and earlier allows remote authenticated users to inject script through an X-Forwarded-For header. The upload workflow stores the header value and later renders it for an administrator without neutralizing HTML special characters. Exploitation requires upload access and an administrator to open the stored entry; the script then runs within the administrator's browser session.
Summary
What happened
Stored XSS in helloxz imgURL 2.31 and earlier allows remote authenticated users to inject script through an X-Forwarded-For header. The upload workflow stores the header value and later renders it for an administrator without neutralizing HTML special characters. Exploitation requires upload access and an administrator to open the stored entry; the script then runs within the administrator's browser session.
The record
- CVE
- CVE-2021-38713
- Published
- Aug 16, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-79, T1203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 16, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- X-Forwarded-For stored-XSS proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo