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CVE-2009-4924

17
FAUCET Score

CVE-2009-4924 describes a cross-site scripting (XSS) vulnerability in Dan Pascu python-cjson version 1.0.5. The flaw arises from improper handling of a ['/'] argument to cjson.encode, which can be leveraged by remote attackers to facilitate XSS attacks, particularly affecting Firefox browsers and SCRIPT element end tags. With a CVSS score of 4.3 (medium severity), this vulnerability has a network attack vector, medium attack complexity, and a potential impact of partial integrity loss. There is no evidence of active exploitation, nor is exploit code publicly available in Metasploit, Nuclei, or ExploitDB, and it has garnered minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.5CPE matchmatch criteria
cpe:2.3:a:dan_pascu:python-cjson:1.0.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.35%
Probability of exploitation in next 30 days
EPSS Percentile
68.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0135 is in the 39th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: python-cjsonFixed in: 1.1.0

Vendor Advisories (1)

pipGHSA-95jp-77w6-qj52medium

Cross-site Scripting in python-cjson

Dec 6, 2021

References

pypi.python.org / pypi/python-cjson
t3.dotgnu.info / blog/insecurity/quotes-dont-help.html