CVE-2023-5958 json
POST SMTP Mailer < 2.7.1 - Unauthenticated Cross-site Scripting
published 2023-11-27 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-58229
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
The POST SMTP Mailer WordPress plugin before 2.7.1 does not escape email message content before displaying it in the backend, allowing an unauthenticated attacker to perform XSS attacks against highly privileged users.
Patch / fix
- Unknown POST SMTP Mailer 2.7.1
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/22fa478d-e42e-488d-9b4b-a8720dec7cee referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected products
- Unknown POST SMTP Mailer
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
wpscan.com
/vulnerability/22fa478d-e42e-488d-9b4b-a8720dec7cee
exploit, vdb-entry, technical-description, third-party-advisory
Sources
- CVE List CVE-2023-5958
- NVD CVE-2023-5958
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.