Stored XSS via unvalidated SVG logo upload
Published Jun 11, 2026 · Updated Jun 11, 2026
Stored XSS in SolidInvoice before 2.3.17 allows remote authenticated users with administrator access to execute JavaScript in users' browsers. ImageUploadType checks only whether the PHP upload succeeded, then stores an SVG as base64; GlobalExtension marks app_logo output safe and embeds it unescaped on every page. Administrator credentials are required to plant the logo, after which ordinary page views execute the script in every authenticated user's application origin, enabling session theft and actions as affected users.
Summary
What happened
Stored XSS in SolidInvoice before 2.3.17 allows remote authenticated users with administrator access to execute JavaScript in users' browsers. ImageUploadType checks only whether the PHP upload succeeded, then stores an SVG as base64; GlobalExtension marks app_logo output safe and embeds it unescaped on every page. Administrator credentials are required to plant the logo, after which ordinary page views execute the script in every authenticated user's application origin, enabling session theft and actions as affected users.
The record
- CVE
- CVE-2026-46489
- Published
- Jun 11, 2026
- Updated
- Jun 11, 2026
- Vendor
- SolidInvoice
- Product
- SolidInvoice
- Classifications
- T1059.007
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jun 11, 2026CVE publishedPublication date reported by the CVE source.
- Jun 11, 2026Record 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=< 2.3.17
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
- GHSA-mqwm-r4g8-wf4w administrator SVG proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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