CVE-2021-26722 LinkedIn Oncall vulnerable to Cross-Site Scripting
Reflected XSS in LinkedIn Oncall allows attackers to execute arbitrary scripts via the search bar, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-26722?
CVE-2021-26722 is a medium-severity cross-site scripting vulnerability in n/a, published on 5 Feb 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
LinkedIn Oncall through 1.4.0 allows reflected XSS via /query because of mishandling of the "No results found for" message in the search bar.
Weakness: CWE-79
Which versions are affected by CVE-2021-26722?
3 open source packages ship an affected version, including oncall. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
oncall PyPI | All versions | 1.4.1 |
oncall PyPI | All versions | 1.4.1 |
oncall PyPI | All versions | 1.4.1 |
Products include Linkedin Oncall.
How do I fix CVE-2021-26722?
Upgrade oncall to 1.4.1 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-26722 being exploited?
There is no known exploitation of CVE-2021-26722 in the wild and no public exploit code.
Sources
Also known as GHSA-rfw2-x9f8-2f6m, PYSEC-2021-33.