How severe is CVE-2022-35251?

CVE-2022-35251 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2022-35251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-35251?

CVE-2022-35251 affects Rocket.chat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-35251?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-35251 published?

CVE-2022-35251 was published on 2022-09-23 and last updated on 2026-06-17.

CVE-2022-35251

CVE-2022-35251 is a medium-severity vulnerability in Rocket.chat with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Rocket.chat
Published: 2022-09-23
Last modified: 2026-06-17

Description

A cross-site scripting vulnerability exists in Rocket.chat <v5 due to style injection in the complete chat window, an adversary is able to manipulate not only the style of it, but will also be able to block functionality as well as hijacking the content of targeted users. Hence the payloads are stored in messages, it is a persistent attack vector, which will trigger as soon as the message gets viewed.

Frequently asked questions

What is CVE-2022-35251?: A cross-site scripting vulnerability exists in Rocket.chat <v5 due to style injection in the complete chat window, an adversary is able to manipulate not only the style of it, but will also be able to block functionality as well as hijacking the content of targeted users. Hence the payloads are stored in messages, it is a persistent attack vector, which will trigger as soon as the message gets viewed.
How severe is CVE-2022-35251?: CVE-2022-35251 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2022-35251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-35251?: CVE-2022-35251 affects Rocket.chat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-35251?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-35251 published?: CVE-2022-35251 was published on 2022-09-23 and last updated on 2026-06-17.

References

https://hackerone.com/reports/1401268

Affected products (1)

cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*

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