CVE-2026-17520 json
Newsletters < 4.17 - Unauthenticated API Access via Predictable API Key
published 2026-08-29 2 mo ago modified 2026-08-31 2 mo ago also EUVD-2026-68045
- cvss
- 4.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
Summary
The Newsletters WordPress plugin before 4.17 does not generate its API key using a sufficiently random source, deriving it from a publicly known value, allowing unauthenticated attackers to compute the key and perform privileged actions such as adding and deleting subscribers and sending emails, when the optional API has been enabled.
Patch / fix
- Unknown Newsletters 4.17
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/5a719e6b-22e1-4950-bf17-cd92e2ea6685/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L |
| CNA | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L |
Affected products
- Unknown Newsletters
Classification
- Weakness
-
- CWE-326 Inadequate Encryption Strength
- Technology feeds
References
-
wpscan.com
/vulnerability/5a719e6b-22e1-4950-bf17-cd92e2ea6685/
exploit, vdb-entry, technical-description
Sources
- CVE List CVE-2026-17520
- NVD CVE-2026-17520
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.