CVE-2026-121733
Bagisto before 2.4.5 Stored XSS via RMA Conversation Attachment Upload
Description
Bagisto before 2.4.5 contains a stored cross-site scripting vulnerability that allows authenticated customers to upload HTML files via the RMA send-message endpoint without type or extension validation. Attackers can upload a .html attachment containing JavaScript served under /storage/rma-conversation/, executing script in the shop's origin when an administrator opens it.
INFO
Published Date :
Nov. 3, 2026, 11:17 p.m.
Last Modified :
Nov. 3, 2026, 11:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | LOW | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update Bagisto to version 2.4.5 or later.
- Validate file types and extensions on upload.
- Restrict script execution from uploaded files.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-121733.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-121733 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-121733
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-121733 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-121733 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Nov. 03, 2026
Action Type Old Value New Value Added Description Bagisto before 2.4.5 contains a stored cross-site scripting vulnerability that allows authenticated customers to upload HTML files via the RMA send-message endpoint without type or extension validation. Attackers can upload a .html attachment containing JavaScript served under /storage/rma-conversation/, executing script in the shop's origin when an administrator opens it. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Added CWE CWE-434 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/121xxx/CVE-2026-121733.json">CVE-2026-121733</a> Added Reference https://github.com/bagisto/bagisto Added Reference https://github.com/bagisto/bagisto/blob/v2.4.4/packages/Webkul/Shop/src/Http/Controllers/Customer/Account/RMAController.php#L408 Added Reference https://github.com/bagisto/bagisto/commit/204e43c26705b66ef2ddfb2a9eebb25f5e8f6a2c Added Reference https://github.com/bagisto/bagisto/commit/e28db3e8c53a94a99cf153ac338466720acd9004 Added Reference https://github.com/bagisto/bagisto/releases/tag/v2.4.5 Added Reference https://www.vulncheck.com/advisories/bagisto-before-2.4.5-stored-xss-via-rma-conversation-attachment-upload