Stored script execution via unsanitized custom types
Published Jul 7, 2021 · Updated Sep 16, 2024
Stored XSS in WP Upload Restriction 2.2.3 and earlier allows remote authenticated users to inject scripts through custom file types. The saveCustomType function accepts custom MIME-type and extension parameters without sanitizing them or escaping them when rendering the extensions page. Subscriber-level access is sufficient to store a payload that executes in the browser of a user who opens that administration page.
Summary
What happened
Stored XSS in WP Upload Restriction 2.2.3 and earlier allows remote authenticated users to inject scripts through custom file types. The saveCustomType function accepts custom MIME-type and extension parameters without sanitizing them or escaping them when rendering the extensions page. Subscriber-level access is sufficient to store a payload that executes in the browser of a user who opens that administration page.
The record
- CVE
- CVE-2021-34625
- Published
- Jul 7, 2021
- Updated
- Sep 16, 2024
- Vendor
- Sajjad Hossain
- Product
- WP Upload Restriction
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 7, 2021CVE publishedPublication date reported by the CVE source.
- Sep 16, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.2.3 <=2.2.3
What conditions does exploitation require?
What is affected?
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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