Stored XSS via invoice footer filter bypass
Published Aug 4, 2021 · Updated Sep 17, 2024
Stored XSS in Akaunting 2.1.12 and earlier allows remote authenticated users to execute JavaScript through a crafted invoice footer. The sales-invoice update endpoint accepts footer HTML whose greater-than sign placement bypasses the built-in firewall regex, then stores and renders the event-handler payload. The attacker needs permission to add or modify sales invoices, and code runs when another user views the poisoned invoice.
Summary
What happened
Stored XSS in Akaunting 2.1.12 and earlier allows remote authenticated users to execute JavaScript through a crafted invoice footer. The sales-invoice update endpoint accepts footer HTML whose greater-than sign placement bypasses the built-in firewall regex, then stores and renders the event-handler payload. The attacker needs permission to add or modify sales invoices, and code runs when another user views the poisoned invoice.
The record
- CVE
- CVE-2021-36805
- Published
- Aug 4, 2021
- Updated
- Sep 17, 2024
- Vendor
- Akaunting
- Product
- Akaunting
- Classifications
- CWE-79, T1203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 4, 2021CVE publishedPublication date reported by the CVE source.
- Sep 17, 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=2.1.12 <=2.1.12
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
- Rapid7 invoice footer XSS proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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