CVE-2021-24874 json
Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue < 3.1.31 - Reflected Cross-Site Scripting
published 4y ago modified 4mo ago also EUVD-2021-11786
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
The Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue WordPress plugin before 3.1.31 does not escape the lang and pid parameter before outputting them back in attributes, leading to Reflected Cross-Site Scripting issues
Patch / fix
- brevo newsletter,_smtp,_email_marketing_and_subscribe 3.1.31
Is CVE-2021-24874 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.80% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/28d34cc1-2294-4409-a60f-c8c441eb3f2d 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 |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Affected products
- Unknown Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
wpscan.com
/vulnerability/28d34cc1-2294-4409-a60f-c8c441eb3f2d
exploit, third-party-advisory
Sources
- CVE List CVE-2021-24874
- NVD CVE-2021-24874
Fencer Intel 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.