Skip to main content

Yui CVE-2012-5883

MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2012-11-16 cve@mitre.org
XSS Mozilla Bugzilla Yui Yahoo
4.3
CVSS 2.0 · NVD
View

Vulnerability Assessment

Weakness
CWE
CWE-79
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Sign in to read
Impact

CVSS score of 4.3 (MEDIUM). Attack characteristics: network attack vector, M complexity. EPSS exploitation probability: 0.63%.
Exploit ScenarioDerived

A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.6% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.8.0 through 2.9.0, as used in Bugzilla 3.7.x and 4.0.x before 4.0.9, 4.1.x and 4.2.x before 4.2.4, and 4.3.x. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Sign in to check
Technical ContextAI · show details

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.8.0 through 2.9.0, as used in Bugzilla 3.7.x and 4.0.x before 4.0.9, 4.1.x and 4.2.x before 4.2.4, and 4.3.x and 4.4.x before 4.4rc1, allows remote attackers to inject arbitrary web script or HTML via vectors related to swfstore.swf, a similar issue to CVE-2010-4209. Affected products include: Mozilla Bugzilla, Yahoo Yui. Version information: through 2.9.0.

Severity by source

NVD PRIMARY 4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
M
Confidentiality
None
Integrity
P
Availability
None

DescriptionCVE.org

Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.8.0 through 2.9.0, as used in Bugzilla 3.7.x and 4.0.x before 4.0.9, 4.1.x and 4.2.x before 4.2.4, and 4.3.x and 4.4.x before 4.4rc1, allows remote attackers to inject arbitrary web script or HTML via vectors related to swfstore.swf, a similar issue to CVE-2010-4209.

Threat Intelligence Overview

EPSS Score
0.6%
Top 30% exploitable
Data Quality
3 sources
Confidence: Low
NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.6%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

23
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +22
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting MEDIUM

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

Affected Products (CPE)CVE.org

cpe:2.3:a:mozilla:bugzilla:3.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:3.7.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:3.7.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:3.7.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.0:rc1:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.0:rc2:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.0.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.0.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.0.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.0.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.0.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.0.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.1.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.1.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.1.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:4.2:*:*:*:*:*:*:*
+ 16 more

More in Yui

View all
CVE-2013-6780 MEDIUM POC
4.3 Nov 13

Cross-site scripting (XSS) vulnerability in uploader.swf in the Uploader component in Yahoo!. Rated medium severity (CVS
CVE-2013-4940 MEDIUM
4.3 Jul 29

Cross-site scripting (XSS) vulnerability in io.swf in the IO Utility component in Yahoo!. Rated medium severity (CVSS 4.
CVE-2013-4942 MEDIUM
4.3 Jul 29

Cross-site scripting (XSS) vulnerability in flashuploader.swf in the Uploader component in Yahoo!. Rated medium severity
CVE-2013-4941 MEDIUM
4.3 Jul 29

Cross-site scripting (XSS) vulnerability in uploader.swf in the Uploader component in Yahoo!. Rated medium severity (CVS
CVE-2013-4939 MEDIUM
4.3 Jul 29

Cross-site scripting (XSS) vulnerability in io.swf in the IO Utility component in Yahoo!. Rated medium severity (CVSS 4.
CVE-2012-5882 MEDIUM
4.3 Nov 16

Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.5.0 through 2.9.0 allows remote

CVE-2012-5881 MEDIUM
4.3 Nov 16

Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.4.0 through 2.9.0 allows remote

Same weakness CWE-79 – Cross-site Scripting (XSS)

View all
CVE-2020-3580 MEDIUM POC
6.1
CVE-2013-7389 MEDIUM POC
4.3
CVE-2021-25299 MEDIUM POC
6.1
CVE-2014-2120 MEDIUM
6.1
CVE-2023-40000 HIGH POC
8.3
CVE-2016-8581 MEDIUM POC
6.1
CVE-2013-5223 MEDIUM POC
5.4
CVE-2025-52367 MEDIUM POC
5.4

Same technique XSS

View all
CVE-2017-9248 CRITICAL POC
9.8
CVE-2013-1710 CRITICAL POC
10.0
CVE-2024-52875 HIGH POC
8.8

References

Advisories & patches
PATCH http://yuilibrary.com/support/20121030-vulnerability/ REF http://www.bugzilla.org/security/3.6.11/ REF http://www.mandriva.com/security/advisories?name=MDVSA-2013:066 REF http://www.securityfocus.com/bid/56385 REF http://www.yuiblog.com/blog/2012/10/30/security-announcement-swf-vulnerability-in-yui-2/ REF http://www.yuiblog.com/blog/2012/11/05/post-mortem-swf-vulnerability-in-yui-2/ REF https://bugzilla.mozilla.org/show_bug.cgi?id=808845 REF https://exchange.xforce.ibmcloud.com/vulnerabilities/80116

Search Externally

GitHub PoC Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy