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 update(FriendLinkDO friendLink) {
        friendLinkService.update(friendLink);
        redisTemplate.delete(CacheKey.INDEX_LINK_KEY);
        return R.ok();
    }