Authenticated script execution via stored Comments payload
Published Aug 12, 2021 · Updated Aug 4, 2024
Stored cross-site scripting in UK CMS 1.1.10 allows remote authenticated users to execute arbitrary scripts via a crafted Comments payload. The index.php/legend/6.html Comments handling stores attacker-controlled markup without neutralization, which executes when an administrator views the comments. Exploitation requires network access, authenticated submission privileges, and administrator interaction; the documented impact is arbitrary script or HTML execution in the administrator's browser.
Summary
What happened
Stored cross-site scripting in UK CMS 1.1.10 allows remote authenticated users to execute arbitrary scripts via a crafted Comments payload. The index.php/legend/6.html Comments handling stores attacker-controlled markup without neutralization, which executes when an administrator views the comments. Exploitation requires network access, authenticated submission privileges, and administrator interaction; the documented impact is arbitrary script or HTML execution in the administrator's browser.
The record
- CVE
- CVE-2020-20977
- Published
- Aug 12, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 12, 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
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- UK CMS stored XSS reproduction in GitHub issue #6proof of concept · demonstrated
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Technologies
Your stack
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Your stack
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