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CVE-2013-4891

17
FAUCET Score

CVE-2013-4891 describes a cross-site scripting (XSS) vulnerability in the xss_clean function of CodeIgniter versions prior to 2.1.4, allowing remote attackers to bypass protection mechanisms through unclosed HTML tags. With a CVSS v3 score of 6.1 (Medium), this vulnerability has a low attack complexity and requires user interaction, potentially leading to limited impact on confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.1.4CPE matchmatch criteria
cpe:2.3:a:codeigniter:codeigniter:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.45%
Probability of exploitation in next 30 days
EPSS Percentile
70.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0145 is in the 83rd percentile among its peer group of 26,234 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / bcit-ci/CodeIgniter/issues/4020
Issue TrackingThird Party Advisory
nealpoole.com / blog/2013/07/codeigniter-21-xss-clean-filter-bypass
ExploitThird Party Advisory
codeigniter.com / userguide2/changelog.html
Release Notes