GHSA-65cv-w493-7vhq

Suggest an improvement
Source
https://github.com/advisories/GHSA-65cv-w493-7vhq
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-65cv-w493-7vhq/GHSA-65cv-w493-7vhq.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-65cv-w493-7vhq
Aliases
Published
2026-09-02T15:09:33Z
Modified
2026-09-02T15:15:09Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Sulu: Fix authorization bypass when creating preview links
Details

Impact

A missing authorization check on the preview link endpoint lets a backend user create a public, unauthenticated preview URL for content they are not allowed to see.

PreviewLinkController (and the underlying PreviewLinkManager::generate() / revoke()) never enforced a permission on the target resource. Any authenticated administration user could call the generate action for any page, article or snippet, including content in a webspace or area they have no VIEW rights on. The endpoint returns a public render URL that resolves the content solely by an opaque token, so the attacker (or anyone they share the link with) can then read the restricted content without authentication.

This affects installations that use Sulu role and webspace permissions to restrict who may see certain content. Exploitation requires an authenticated backend user and the id of the target resource.

Patches

Fixed in 2.6.x and 3.0.x. PreviewLinkManager::generate() and revoke() now resolve the resource's security context and enforce a VIEW permission check before a preview link is created or removed. A user without VIEW access on the resource receives a 403 response and no link is created.

Note on scope: this patch closes the authorization bypass. Two related hardening items from the original report are tracked as a separate follow-up because they require a database migration:

  • The preview link token is derived from substr(md5(uuid), 0, 12) (about 48 bits of entropy).
  • Preview links never expire.

Workarounds

If you cannot upgrade immediately:

  • Restrict backend access so that only trusted users can reach the administration interface.
  • Apply the fix manually by adding a VIEW permission check (via SecurityCheckerInterface and the resource's security context) inside PreviewLinkManager::generate() and revoke().
Database specific 
{
    "cwe_ids":  [
        "CWE-862",
        "CWE-863"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-09-02T15:09:33Z",
    "nvd_published_at":  "2026-08-31T22:17:22Z",
    "severity":  "MODERATE"
}
References

Affected packages

Packagist / sulu/sulu

Package

Name
sulu/sulu
Purl
pkg:composer/sulu/sulu

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.6.25

Affected versions

0.*
0.1.0
0.1.1
0.2.0
0.3.0
0.4.0
0.5.0
0.6.0
0.6.1
0.6.2
0.6.3
0.6.4
0.6.5
0.6.6
0.6.7
0.6.8
0.7.0
0.7.1
0.8.0
0.8.1
0.8.2
0.8.3
0.8.4
0.8.5
0.8.6
0.9.0
0.10.0
0.10.1
0.10.2
0.11.0
0.11.1
0.11.2
0.12.0
0.13.0
0.13.1
0.13.2
0.14.0
0.14.1
0.14.2
0.15.0
0.15.1
0.15.2
0.15.3
0.16.0
0.16.1
0.16.2
0.17.0-RC1
0.17.0-RC2
0.17.0
0.18.0
0.18.1
0.18.2
1.*
1.0.0-RC1
1.0.0-RC2
1.0.0-RC3
1.0.0
1.0.1
1.0.2
1.0.3
1.0.4
1.0.5
1.0.6
1.0.7
1.0.8
1.0.9
1.0.10
1.0.11
1.0.12
1.0.13
1.0.14
1.0.15
1.1.0-beta1
1.1.0-RC1
1.1.0-RC2
1.1.0
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.1.6
1.1.7
1.1.8
1.1.9
1.1.10
1.1.11
1.1.12
1.2.0-RC1
1.2.0-RC2
1.2.0-RC3
1.2.0-RC4
1.2.0
1.2.1
1.2.2
1.2.3
1.2.4
1.2.5
1.2.6
1.2.7
1.2.8
1.2.9
1.3.0-RC1
1.3.0-RC2
1.3.0-RC3
1.3.0
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6
1.3.7
1.3.8
1.3.9
1.3.10
1.3.11
1.4.0-RC1
1.4.0-RC2
1.4.0
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.4.7
1.4.8
1.4.9
1.4.10
1.4.11
1.4.12
1.5.0-RC1
1.5.0-RC2
1.5.0-RC3
1.5.0
1.5.1
1.5.2
1.5.3
1.5.4
1.5.5
1.5.6
1.5.7
1.5.8
1.5.9
1.5.10
1.5.11
1.5.12
1.5.13
1.5.14
1.5.15
1.5.16
1.5.17
1.5.18
1.5.19
1.5.20
1.5.21
1.5.22
1.5.23
1.5.24
1.6.0-RC1
1.6.0
1.6.1
1.6.2
1.6.3
1.6.4
1.6.5
1.6.6
1.6.7
1.6.8
1.6.9
1.6.10
1.6.11
1.6.12
1.6.13
1.6.14
1.6.15
1.6.16
1.6.17
1.6.18
1.6.19
1.6.20
1.6.21
1.6.22
1.6.23
1.6.24
1.6.25
1.6.26
1.6.27
1.6.28
1.6.29
1.6.30
1.6.31
1.6.32
1.6.33
1.6.34
1.6.35
1.6.36
1.6.37
1.6.38
1.6.39
1.6.40
1.6.41
1.6.42
1.6.43
1.6.44
1.6.45
1.6.46
2.*
2.0.0-alpha1
2.0.0-alpha2
2.0.0-alpha3
2.0.0-alpha4
2.0.0-alpha5
2.0.0-alpha6
2.0.0-RC1
2.0.0-RC2
2.0.0-RC3
2.0.0
2.0.1
2.0.2
2.0.3
2.0.4
2.0.5
2.0.6
2.0.7
2.0.8
2.0.9
2.0.10
2.0.11
2.0.12
2.1.0-RC1
2.1.0-RC2
2.1.0
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
2.1.7
2.1.8
2.1.9
2.1.10
2.1.11
2.1.12
2.1.13
2.1.14
2.2.0-RC1
2.2.0
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
2.2.8
2.2.9
2.2.10
2.2.11
2.2.12
2.2.13
2.2.14
2.2.15
2.2.16
2.2.17
2.2.18
2.2.19
2.3.0-RC1
2.3.0-RC2
2.3.0
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
2.3.8
2.3.9
2.3.10
2.3.11
2.3.12
2.3.13
2.4.0-RC1
2.4.0
2.4.1
2.4.2
2.4.3
2.4.4
2.4.5
2.4.6
2.4.7
2.4.8
2.4.9
2.4.10
2.4.11
2.4.12
2.4.13
2.4.14
2.4.15
2.4.16
2.4.17
2.4.18
2.4.19
2.4.20
2.5.0-alpha1
2.5.0
2.5.1
2.5.2
2.5.3
2.5.4
2.5.5
2.5.6
2.5.7
2.5.8
2.5.9
2.5.10
2.5.11
2.5.12
2.5.13
2.5.14
2.5.15
2.5.16
2.5.17
2.5.18
2.5.19
2.5.20
2.5.21
2.5.22
2.5.23
2.5.24
2.5.25
2.5.26
2.5.27
2.5.28
2.5.29
2.5.30
2.5.31
2.5.32
2.5.33
2.6.0-RC1
2.6.0-RC2
2.6.0
2.6.1
2.6.2
2.6.3
2.6.4
2.6.5
2.6.6
2.6.7
2.6.8
2.6.9
2.6.10
2.6.11
2.6.12
2.6.13
2.6.14
2.6.15
2.6.16
2.6.17
2.6.18
2.6.19
2.6.20
2.6.21
2.6.22
2.6.23
2.6.24

Database specific

last_known_affected_version_range 
"<= 2.6.24"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-65cv-w493-7vhq/GHSA-65cv-w493-7vhq.json"

Packagist / sulu/sulu

Package

Name
sulu/sulu
Purl
pkg:composer/sulu/sulu

Affected ranges

Type
ECOSYSTEM
Events
Introduced
3.0.0-alpha1
Fixed
3.0.8

Affected versions

3.*
3.0.0-alpha1
3.0.0-alpha2
3.0.0-alpha3
3.0.0-alpha4
3.0.0-alpha5
3.0.0-beta1
3.0.0-beta2
3.0.0-beta3
3.0.0-beta4
3.0.0-RC1
3.0.0-RC2
3.0.0
3.0.1
3.0.2
3.0.3
3.0.4
3.0.5
3.0.6
3.0.7

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-65cv-w493-7vhq/GHSA-65cv-w493-7vhq.json"