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CVE Vulnerability Details :
CVE-2026-33741
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-19 May, 2026 | 18:14
Updated At-19 May, 2026 | 18:14
Rejected At-
▼CVE Numbering Authority (CNA)
EspoCRM: Stored XSS via SVG attachment loading same-origin JavaScript

EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below allow authenticated users to upload SVG attachments through normal attachment-capable fields and later serve those SVG files as top-level inline documents through both the attachment and image entry points, resulting in stored cross-user XSS reachable through a normal attachment workflow. Although inline SVG script is blocked by the response CSP, the same CSP still allows same-origin external script. As a result, an attacker can upload a malicious SVG together with a second attacker-controlled JavaScript attachment, then trick another user into opening the SVG to execute JavaScript in the victim's EspoCRM origin. This issue has been fixed in version 9.3.4.

Affected Products
Vendor
espocrm
Product
espocrm
Versions
Affected
  • < 9.3.4
Problem Types
TypeCWE IDDescription
CWECWE-79CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Type: CWE
CWE ID: CWE-79
Description: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Metrics
VersionBase scoreBase severityVector
3.16.8MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
Version: 3.1
Base score: 6.8
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

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Workarounds

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Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/espocrm/espocrm/security/advisories/GHSA-5wh5-ccv2-m3pv
x_refsource_CONFIRM
Hyperlink: https://github.com/espocrm/espocrm/security/advisories/GHSA-5wh5-ccv2-m3pv
Resource:
x_refsource_CONFIRM
Details not found