CVE-2020-15270 json
Improper session expiration in Parse Server
published 2020-10-22 6 y ago modified 2026-09-08 2 mo ago also BIT-parse-2020-15270 , EUVD-2020-1402 , GHSA-2xm2-xj2q-qgpj
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 67%
- public exploits
- 0
- none known
Summary
Parse Server (npm package parse-server) broadcasts events to all clients without checking if the session token is valid. This allows clients with expired sessions to still receive subscription objects. It is not possible to create subscription objects with invalid session tokens. The issue is not patched.
Patch / fix
Exploit prediction
1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:P/I:N/A:N |
| OSV | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | parse-server | <4.4.0 |
4.4.0 |
| bitnami | parse | <4.3.1 |
4.3.1 |
Affected products
- parse-community parse-server
Classification
- Weakness
-
- CWE-672 Operation on a Resource after Expiration or Release
References
-
github.com
/parse-community/parse-server/commit/78b59fb26b1c36e3cdbd42ba9fec025003267f58
web, patch, third-party-advisory, advisory
-
github.com
/parse-community/parse-server/security/advisories/GHSA-2xm2-xj2q-qgpj
web, third-party-advisory, advisory
-
npmjs.com
/parse-server
product, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-15270
advisory, web
-
github.com
/parse-community/parse-server
package
Sources
- CVE List CVE-2020-15270
- GitHub Advisory GHSA-2xm2-xj2q-qgpj
- NVD CVE-2020-15270
- OSV BIT-parse-2020-15270
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