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CVE-2015-5520

CWE-79Published: July 14, 2015· Updated: Jun 17, 2026

4.3

CVSS v3.1

Official Description

Cross-site scripting (XSS) vulnerability in the Users module in Orchard 1.7.3 through 1.8.2 and 1.9.x before 1.9.1 allows remote attackers to inject arbitrary web script or HTML via the username when creating a new user account, which is not properly handled when deleting an account.

Technical Analysis

CVE-2015-5520 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2015-5520. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityM

Privileges Req.

User Interaction

Scope

Impact

ConfidentialityNone

IntegrityP

AvailabilityNone

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

Affected Vendors & Products

orchardproject1 product(s)

orchard

Source: NVD CPE · 5 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://docs.orchardproject.net/Documentation/Patch-20150630

PATCHhttp://docs.orchardproject.net/Documentation/Patch-20150630

All References (10)

→

http://docs.orchardproject.net/Documentation/Patch-20150630Patch · Vendor Advisory

→

http://packetstormsecurity.com/files/132583/Orchard-CMS-1.9.0-1.8.2-1.7.3-Cross-Site-Scripting.htmlExploit

→

http://seclists.org/fulldisclosure/2015/Jul/32Exploit

→

https://projectzero.gr/en/2015/07/orchard-persistent-xss-vulnerability/Exploit

→

https://www.exploit-db.com/exploits/37533/Exploit

→

http://docs.orchardproject.net/Documentation/Patch-20150630Patch · Vendor Advisory

→

http://packetstormsecurity.com/files/132583/Orchard-CMS-1.9.0-1.8.2-1.7.3-Cross-Site-Scripting.htmlExploit

→

http://seclists.org/fulldisclosure/2015/Jul/32Exploit

→

https://projectzero.gr/en/2015/07/orchard-persistent-xss-vulnerability/Exploit

→

https://www.exploit-db.com/exploits/37533/Exploit

Quick Facts

CVE IDCVE-2015-5520

CVSS Score4.3 / 10

SeverityMEDIUM

WeaknessCWE-79

CISA KEVNo

ExploitPOC

Affected1 vendor(s)

PublishedJul 14, 2015

Related CVEs (CWE-79)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2015-5520 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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