Description
Apostrophe CMS versions between 2.63.0 to 3.3.1 are vulnerable to Stored XSS where an editor uploads an SVG file that contains malicious JavaScript onto the Images module, which triggers XSS once viewed.
References (1)
Core 1
Core References
Patch, Third Party Advisory x_refsource_misc
https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59
Scores
CVSS v3
5.4
EPSS
0.0021
EPSS Percentile
42.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (2)
apostrophecms/apostrophecms
2.63.0 - 3.3.1
npm/apostrophe
2.63.0 - 3.4.0npm
Published
Nov 07, 2021
Tracked Since
Feb 18, 2026