Language: Java
Label: vulnerable
CWE: CWE-79 \u2014 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Code:
    public R save(FriendLinkDO friendLink) {
        if (friendLinkService.save(friendLink) > 0) {
            redisTemplate.delete(CacheKey.INDEX_LINK_KEY);
            return R.ok();
        }
        return R.error();
    }