CVE-2010-0817Sharepoint Server XSS
Cross-site scripting (XSS) vulnerability in _layouts/help.aspx in Microsoft SharePoint Server 2007 12.0.0.6421 and possibly earlier, and SharePoint Services 3.0 SP1 and SP2, versions, allows remote attackers to inject arbitrary web script or HTML via the cid0 parameter.
Published Apr 29, 2010 · Updated Apr 28, 2026
Key Facts
Patch immediately- CVE-2010-0817 is a medium-severity vulnerability (CVSS 4.3 v2) affecting Sharepoint Server (Microsoft), Sharepoint Services (Microsoft).
- It is exploited in the wild, listed in Industry KEV feed since Jun 8, 2010. Public exploit code is available.
- EPSS estimates a 29% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v2
4.3
AV:N/AC:M/Au:N/C:N/I:P/A:N
EPSS (30-day exploit likelihood)
29%
Higher than 98.1% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
44/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Jun 8, 2010
40 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
2
Reports of active use
Description
Cross-site scripting (XSS) vulnerability in _layouts/help.aspx in Microsoft SharePoint Server 2007 12.0.0.6421 and possibly earlier, and SharePoint Services 3.0 SP1 and SP2, versions, allows remote attackers to inject arbitrary web script or HTML via the cid0 parameter.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jun 8, 2010 | n/a | Not reported |
Affected Products
5 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Sharepoint ServerMicrosoft | 2007 | n/a |
| Sharepoint ServicesMicrosoft | 3.0-sp1, 3.0-sp2 | n/a |
Timeline
Publicly disclosed
Apr 29, 2010
Added to Industry KEV feed
Jun 8, 2010
Last updated
Apr 28, 2026
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- exploitVulnCheck exploitation report
- exploitExploitDB-12450
- exploithtbridge.ch · xss_in_microsoft_sharepoint_server_2007.html
- otherMS10-039
- otheroval:org.mitre.oval:def:7468
FAQ
Common Questions.
Cross-site scripting (XSS) vulnerability in _layouts/help.aspx in Microsoft SharePoint Server 2007 12.0.0.6421 and possibly earlier, and SharePoint Services 3.0 SP1 and SP2, versions, allows remote attackers to inject arbitrary web script or HTML via the cid0 parameter.
Affected: Sharepoint Server (Microsoft) versions 2007; Sharepoint Services (Microsoft) versions 3.0-sp1, 3.0-sp2. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Jun 8, 2010.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2010-0817 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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