Stored XSS via bypassable SVG script filtering
Published Mar 26, 2024 · Updated Aug 2, 2024
Stored XSS in Photo Gallery by 10Web 1.0.1 through 1.8.21 allows remote authenticated users to upload executable SVG content. UploadHandler.php rewrites SVG files with a regular expression that misses closing script tags containing whitespace, leaving embedded JavaScript intact. A user with image-upload permission must store the file, after which unauthenticated visitors can retrieve it and the script executes in their browsers.
Summary
What happened
Stored XSS in Photo Gallery by 10Web 1.0.1 through 1.8.21 allows remote authenticated users to upload executable SVG content. UploadHandler.php rewrites SVG files with a regular expression that misses closing script tags containing whitespace, leaving embedded JavaScript intact. A user with image-upload permission must store the file, after which unauthenticated visitors can retrieve it and the script executes in their browsers.
The record
- CVE
- CVE-2024-29833
- Published
- Mar 26, 2024
- Updated
- Aug 2, 2024
- Vendor
- 10Web
- Product
- Photo Gallery by 10Web
- Classifications
- CWE-79, CAPEC-63, T1203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 26, 2024CVE publishedPublication date reported by the CVE source.
- Aug 2, 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=1.0.1 <=1.8.21
What conditions does exploitation require?
What is affected?
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
- Whitespace-closing-tag SVG proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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