SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2008-4020

Cross-site scripting (XSS) vulnerability in Microsoft Office XP SP3 allows remote attackers to inject arbitrary web script or HTML via a document that contains a "Content-Disposition: attachment" header and is accessed through a cdo: URL, which renders…

MEDIUM 4.3EPSS 24.4%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 24.4%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.

Description

Cross-site scripting (XSS) vulnerability in Microsoft Office XP SP3 allows remote attackers to inject arbitrary web script or HTML via a document that contains a "Content-Disposition: attachment" header and is accessed through a cdo: URL, which renders the content instead of raising a File Download dialog box, aka "Vulnerability in Content-Disposition Header Vulnerability."

CVSS 2.0
4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
EPSS
24.39% probability · 98th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-79
Affected
microsoft/office
Source
secure@microsoft.com
EPSS trend
0%13%25%26 October 2026: 24.39%26 October 202626 October 2026

EPSS 24.4% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.