CVE-2021-28121 json
Virtual Robots.txt before 1.10 does not block HTML tags in the robots.txt field.
published 2021-08-12 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-14822
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 76%
- public exploits
- 0
- none known
Summary
Virtual Robots.txt before 1.10 does not block HTML tags in the robots.txt field.
Patch / fix
- virtual_robots.txt_project virtual_robots.txt 1.10
Exploit prediction
1.67% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Technology feeds
References
-
wordpress.org
/plugins/pc-robotstxt/#developers
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-28121
- NVD CVE-2021-28121
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