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Medium

Silverstripe uses TinyMCE which allows svg files linked in object tags

  • Disclosed: 17.07.2024
  • Updated: 11.10.2026 10:22

Impact

TinyMCE v6 has a configuration value convert_unsafe_embeds set to false which allows svg files containing javascript to be used in <object> or <embed> tags, which can be used as a vector for XSS attacks.

Note that <embed> tags are not allowed by default.

After patching the default value of convert_unsafe_embeds will be set to true. This means that <object> tags will be converted to iframes instead the next time the page is saved, which may break any pages that rely upon previously saved <object> tags. Developers can override this configuration if desired to revert to the original behaviour.

We reviewed the potential impact of this vulnerability within the context of Silverstripe CMS. We concluded this is a medium impact vulnerability given how TinyMCE is used by Silverstripe CMS.

References:

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package silverstripe/framework < 5.2.16 5.2.16

References

CVSS score 5.4/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE)
CWE-1395, CWE-79
Platform
Composer
Package
silverstripe/framework
Disclosed
17.07.2024
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-52cw-pvq9-9m5v - CC BY 4.0

Vulnerability history: silverstripe/framework

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (93) in the archive
Total entries
93
First → latest
11.2019 08.2026
Without a fix
1
Exploited in attacks
0

Severity breakdown

  • Critical 3
  • High 13
  • Medium 69
  • Low 8

Disclosures per year

Severity:
  1. Silverstripe uses TinyMCE which allows svg files linked in object tags this entry
    Medium · 5.4 ghsa-52cw-pvq9-9m5v < 5.2.16 5.2.16
  2. silverstripe/framework has potential SQL Injection vulnerability in PostgreSQL database connector
    High · 8.8 ghsa-265q-222x-52m6 >= 4.0.0-rc1, < 4.0.6, >= 4.1.0-rc1, < 4.1.4, >= 4.2.0-rc1, < 4.2.3 4.0.6, 4.1.4, 4.2.3
  3. silverstripe/framework has possible denial of service attack vector when flushing
    High · 7.5 ghsa-cwgq-83w5-8jfq >= 4.0.0-rc1, < 4.0.5, >= 4.1.0-rc1, < 4.1.3, >= 4.2.0-rc1, < 4.2.2 4.0.5, 4.1.3, 4.2.2
  4. silverstripe/framework allows upload of dangerous file types
    High · 8.8 ghsa-vcg6-8fxc-x5cq >= 3.6.5-rc1, < 3.6.6, >= 4.0.3-rc1, < 4.0.4, >= 4.1.0-rc1, < 4.1.1 3.6.6, 4.0.4, 4.1.1
  5. silverstripe/framework code execution vulnerability
    High · 7.5 ghsa-vgxh-x8jv-hmff >= 4.0.3-rc1, < 4.0.4, >= 4.1.0-rc1, < 4.1.1 4.0.4, 4.1.1
  6. silverstripe/framework BackURL validation bypass with malformed URLs
    High · 7.5 ghsa-m5q3-mvcr-gc5m >= 4.0.0-rc1, < 4.0.4, >= 4.1.0-rc1, < 4.1.1 4.0.4, 4.1.1
  7. silverstripe/framework SQL injection in full text search
    High · 8.8 ghsa-xx4r-5265-48j6 >= 3.5.0-rc1, < 3.5.6, >= 3.6.0-rc1, < 3.6.3, >= 4.0.0-rc1, < 4.0.1 3.5.6, 3.6.3, 4.0.1
  8. silverstripe/framework CSV Excel Macro Injection
    High · 8.0 ghsa-mqjc-x563-c9q8 >= 3.5.0-rc1, < 3.5.6, >= 3.6.0-rc1, < 3.6.3, >= 4.0.0-rc1, < 4.0.1 3.5.6, 3.6.3, 4.0.1
  9. silverstripe/framework vulnerable to user enumeration via timing attack on login and password reset forms
    High ghsa-7m2v-x7rg-5hm5 >= 3.5.0-rc1, < 3.5.5, >= 3.6.0-rc1, < 3.6.2 3.5.5, 3.6.2
  10. silverstripe/framework's User-Agent header not correctly invalidating user session
    High · 7.5 ghsa-4qx8-j9vh-2628 >= 3.5.0-rc1, < 3.5.6, >= 3.6.0-rc1, < 3.6.3 3.5.6, 3.6.3
  11. Silverstripe Brute force bypass on default admin
    Critical · 9.1 ghsa-8v6m-7f5v-hhx6 >= 3.1.18, < 3.1.19, >= 3.2.3, < 3.2.4, >= 3.3.1, < 3.3.2 3.1.19, 3.2.4, 3.3.2
  12. Silverstripe X-Forwarded-Host request hostname injection
    High · 7.2 ghsa-25gq-jvx2-vg9x >= 3.1.0, < 3.1.13 3.1.13
  13. Blind SQL Injection via GridFieldSortableHeader
    High · 8.8 CVE-2022-38148 >= 4.0.0, < 4.10.11, >= 4.11.0, < 4.11.14 4.10.11, 4.11.14
  14. Silverstripe CMS information disclosure
    High · 7.5 CVE-2020-6164 >= 4.0.0, < 4.4.7, >= 4.5.0, < 4.5.4 4.4.7, 4.5.4
  15. SilverStripe Folders migrated from 3.x may be unsafe to upload to
    High · 7.5 CVE-2020-9280 >= 4.0.0, < 4.4.6 4.4.6
  16. Silverstripe Framework SQLi Vulnerability
    Critical · 9.8 CVE-2019-5715 >= 3.0.0, < 3.6.7, >= 4.0.0, < 4.0.7, >= 3.7.0, < 3.7.3, >= 4.1.0, < 4.1.5, >= 4.2.0, < 4.2.4, >= 4.3.0, < 4.3.1 3.6.7, 4.0.7, 3.7.3, 4.1.5, 4.2.4, 4.3.1
  17. Missing warning can lead to unauthenticated admin access in SilverStripe
    Critical · 9.8 CVE-2019-12204 >= 4.1.0, < 4.3.5 4.3.5

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