Serendipity versions >= 2.3.5 and <= 2.6.0 contain a reflected cross-site scripting vulnerability in the search clean-URL route (/search/<term>). In include/functions_routing.inc.php serveSearch(), the sanitisation pipeline runs urldecode() after HTML-encoding, so a single URL-encoded HTML payload survives strip_tags() and htmlspecialchars() and is then decoded back into live HTML in the page. A crafted search link can execute arbitrary JavaScript in the victim's browser.
Fixed in 2.6.1.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 6
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
S9y Serendipity
cpe:2.3:a:s9y:serendipity:2.5.0:-:*:*:*:*:*:*
|
— | — |
|
S9y Serendipity
cpe:2.3:a:s9y:serendipity:2.4.0:-:*:*:*:*:*:*
|
— | — |
|
S9y Serendipity
cpe:2.3:a:s9y:serendipity:2.6.0:beta1:*:*:*:*:*:*
|
— | — |
|
S9y Serendipity
cpe:2.3:a:s9y:serendipity:2.6.0:-:*:*:*:*:*:*
|
— | — |
|
S9y Serendipity
cpe:2.3:a:s9y:serendipity:2.4.0:beta1:*:*:*:*:*:*
|
— | — |
|
S9y Serendipity
cpe:2.3:a:s9y:serendipity:2.3.5:*:*:*:*:*:*:*
|
— | — |