CVE-2021-44082 json
textpattern 4.8.7 is vulnerable to Cross Site Scripting (XSS) via /textpattern/index.php,Body.
published 2022-03-29 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30940
- cvss
- 8.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.0%
- EPSS 3.0% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
textpattern 4.8.7 is vulnerable to Cross Site Scripting (XSS) via /textpattern/index.php,Body. A remote and unauthenticated attacker can use XSS to trigger remote code execution by uploading a webshell. To do so they must first steal the CSRF token before submitting a file upload request.
Exploit prediction
3.04% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- pentest.co.uk https://pentest.co.uk/labs/leveraging-xss-to-get-rce-in-textpattern/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 5.1 | AV:N/AC:H/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
pentest.co.uk
/labs/leveraging-xss-to-get-rce-in-textpattern/
exploit, third-party-advisory
-
pentest.co.uk
third-party-advisory
-
cornerpirate.com
not-applicable
Sources
- CVE List CVE-2021-44082
- NVD CVE-2021-44082
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.