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CVE-2011-0031· NVD / CVE Program· CNA microsoft

The (1) JScript 5.8 and (2) VBScript 5.8 scripting engines in Microsoft Windows Server 2008 R2 and Windows 7 do not properly load decoded sc

The (1) JScript 5.8 and (2) VBScript 5.8 scripting engines in Microsoft Windows Server 2008 R2 and Windows 7 do not properly load decoded scripts obtained from web pages, which allows remote attackers to trigger memory corruption and consequently obtain sensitive information via a crafted web site, aka "Scripting Engines Information Disclosure Vulnerability."

MediumCVSS 4.3 · v2.0—No exploit No fix recorded
Published
Feb 8, 2011
Updated
Jun 16, 2026
EPSS
17.0% · 97th percentile
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Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
5 / 30 · 17.0%

Affected systems

VendorProduct
microsoftwindows 7
microsoftwindows server 2008

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft windows server 2008r2

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    P · data can be read
    Integrity
    none
    Availability
    none
    Attack complexity
    M
    Confidentiality impact
    P
    Integrity impact
    None
    Availability impact
    None

    CVSS vector

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

    nvd-primary

    Root cause

    The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

    A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

    Vulnerable

    json
    {  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

    Fixed

    json
    {  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

    Noroxi analysis

    No Noroxi analysis for this record yet

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    Change log

    No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

    References

    All records