How severe is CVE-2022-21710?

CVE-2022-21710 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2022-21710 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-21710?

CVE-2022-21710 affects Mediawiki Shortdescription. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-21710?

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

When was CVE-2022-21710 published?

CVE-2022-21710 was published on 2022-01-24 and last updated on 2026-06-17.

CVE-2022-21710

CVE-2022-21710 is a medium-severity vulnerability in Mediawiki Shortdescription with a CVSS 3.x base score of 4.7. 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 4.7)
CVSS v2: 4.3
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mediawiki Shortdescription
Published: 2022-01-24
Last modified: 2026-06-17

Description

ShortDescription is a MediaWiki extension that provides local short description support. A cross-site scripting (XSS) vulnerability exists in versions prior to 2.3.4. On a wiki that has the ShortDescription enabled, XSS can be triggered on any page or the page with the action=info parameter, which displays the shortdesc property. This is achieved using the wikitext `{{SHORTDESC:<img src=x onerror=alert()>}}`. This issue has a patch in version 2.3.4.

Frequently asked questions

What is CVE-2022-21710?: ShortDescription is a MediaWiki extension that provides local short description support. A cross-site scripting (XSS) vulnerability exists in versions prior to 2.3.4. On a wiki that has the ShortDescription enabled, XSS can be triggered on any page or the page with the action=info parameter, which displays the shortdesc property. This is achieved using the wikitext `{{SHORTDESC:<img src=x onerror=alert()>}}`. This issue has a patch in version 2.3.4.
How severe is CVE-2022-21710?: CVE-2022-21710 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2022-21710 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-21710?: CVE-2022-21710 affects Mediawiki Shortdescription. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-21710?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-21710 published?: CVE-2022-21710 was published on 2022-01-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mediawiki:shortdescription:*:*:*:*:*:mediawiki:*:*

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