Administrator-context script execution via unescaped collection names
Published Feb 27, 2026 · Updated Feb 27, 2026
Stored XSS in ClipBucket V5 before 5.5.3 #59 allows remote authenticated users to execute JavaScript in an administrator's browser. The flagged-collection template renders element_name without output encoding, so a crafted Collection Name is stored and later inserted as markup. A normal account must create and report a nonempty collection, and an administrator must open Flagged collections; execution is confined to the administrator's browser context.
Summary
What happened
Stored XSS in ClipBucket V5 before 5.5.3 #59 allows remote authenticated users to execute JavaScript in an administrator's browser. The flagged-collection template renders element_name without output encoding, so a crafted Collection Name is stored and later inserted as markup. A normal account must create and report a nonempty collection, and an administrator must open Flagged collections; execution is confined to the administrator's browser context.
The record
- CVE
- CVE-2026-26997
- Published
- Feb 27, 2026
- Updated
- Feb 27, 2026
- Vendor
- MacWarrior
- Product
- ClipBucket V5
- Classifications
- CWE-79, T1203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 27, 2026CVE publishedPublication date reported by the CVE source.
- Feb 27, 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=< 5.5.3 #59
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
- GitHub advisory reproduction procedureproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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