CVE-2013-4891 json
The xss_clean function in CodeIgniter before 2.1.4 might allow remote attackers to bypass an intended protection mechanism and conduct cros…
published 2018-02-21 8 y ago modified 2026-06-16 4 mo ago also EUVD-2013-4736
- cvss
- 6.1
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 73%
- public exploits
- 0
- none known
Summary
The xss_clean function in CodeIgniter before 2.1.4 might allow remote attackers to bypass an intended protection mechanism and conduct cross-site scripting (XSS) attacks via an unclosed HTML tag.
Patch / fix
- codeigniter codeigniter 2.1.4
Exploit prediction
1.43% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- nealpoole.com https://nealpoole.com/blog/2013/07/codeigniter-21-xss-clean-filter-bypass/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 6.1 | CVSS:3.0/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 |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
nealpoole.com
/blog/2013/07/codeigniter-21-xss-clean-filter-bypass/
exploit, third-party-advisory
-
github.com
/bcit-ci/CodeIgniter/issues/4020
issue-tracking, third-party-advisory
-
codeigniter.com
/userguide2/changelog.html
release-notes
Sources
- CVE List CVE-2013-4891
- NVD CVE-2013-4891
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.