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Stored xss bug in gogs/gogs

Valid

Reported on

Apr 12th 2022

Description

stored xss bug

Proof of Concept

create a public repo and create a issue .
now in issue upload a html file with xss payload inside.
When any user view the repo and click the attachment link then xss is executed .
you can upload https://github.com/ranjit-git/poc/edit/master/evilsvgfile.svg this file also

VIDEO

https://drive.google.com/file/d/11wxTj8ILFLxRe2uoAvQ_39i7Hqa1tWHI/view?usp=sharing

Impact

As the repo is public , any user can view the report and when open the attachment then xss is executed. This bug allow executed any javascript code in victim account .

We are processing your report and will contact the gogs team within 24 hours. a year ago
ranjit-git modified the report
a year ago
We have contacted a member of the gogs team and are waiting to hear back a year ago
We have sent a follow up to the gogs team. We will try again in 7 days. a year ago
We have sent a second follow up to the gogs team. We will try again in 10 days. a year ago
Joe Chen validated this vulnerability a year ago
ranjit-git has been awarded the disclosure bounty
The fix bounty is now up for grabs
The researcher's credibility has increased: +7
We have sent a fix follow up to the gogs team. We will try again in 7 days. a year ago
Joe Chen
a year ago

Maintainer

The patch has landed in https://github.com/gogs/gogs/commit/cb35b73048b91ca32ee89d5b05a09552db8e5faf, but we will only "Mark as fixed" until a new release is published according to security policy (https://github.com/gogs/gogs/blob/main/SECURITY.md).

Joe Chen marked this as fixed in 0.12.7 with commit bc7744 a year ago
The fix bounty has been dropped
This vulnerability will not receive a CVE
Joe Chen
a year ago

Maintainer

The patch has been published, thanks again for finding this vulnerability!

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