community_store: Generation of Predictable Numbers or Identifiers
CVE-2026-95653 is a high-severity generation of predictable numbers or identifiers vulnerability in community_store from Concretecms-community-store, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 2.7.8 as the first without the flaw, so updating community_store to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.57% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update community_store to 2.7.8 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Concretecms-community-store | community_store | before 2.7.8 | 2.7.8 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by CNA (vulncheck.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 8.7 | High | CNA (vulncheck.com) |
| CVSS 3.1 | 7.5 | High | CNA (vulncheck.com) |
Official description
Concrete CMS Community Store before 2.7.8 derives digital product download tokens from order creation timestamps instead of random values, making tokens predictable. Unauthenticated attackers can enumerate sequential order and file identifiers to calculate valid download tokens and retrieve digital goods purchased by other customers.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Generation of Predictable Numbers or Identifiers
The product uses a scheme that generates numbers or identifiers that are more predictable than required.
More Generation of Predictable Numbers or Identifiers vulnerabilities (CWE-340)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Other references
- github.com/concretecms-community-store/community_store
- github.com/concretecms-community-store/community_store/blob/v2.7.7/src/CommunityStore/Utilities/Download.php#…
- github.com/concretecms-community-store/community_store/blob/v2.7.7/src/CommunityStore/Utilities/Download.php#…
- vulncheck.com/advisories/concrete-cms-community-store-before-2.7.8-predictable-digital-download-token
Other vulnerabilities in community_store
- 8.1 High severity
Recent Generation of Predictable Numbers or Identifiers vulnerabilities
- 9.1 Critical severity
- 8.2 High severity
- 7.7 High severity
- 9.8 Critical severity
- 7.5 High severity
- 7.5 High severity
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