CVE-2021-39310 json
Real WYSIWYG <= 0.0.2 Reflected Cross-Site Scripting
published 2021-12-14 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-25671
- cvss
- 6.1
- version 3.1, CNA
- 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 Real WYSIWYG WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of PHP_SELF in the ~/real-wysiwyg.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 0.0.2.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 21 mo ago
Exploit prediction
0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 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
- Real WYSIWYG Real WYSIWYG
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
wordfence.com
/vulnerability-advisories/#CVE-2021-39310
third-party-advisory
-
plugins.trac.wordpress.org
/browser/real-wysiwyg/tags/0.0.2/real-wysiwyg.php#L213
third-party-advisory
Sources
- CVE List CVE-2021-39310
- NVD CVE-2021-39310
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.