How severe is CVE-2023-27294?

CVE-2023-27294 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-2023-27294 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-2023-27294?

CVE-2023-27294 affects Opencats. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-27294?

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

When was CVE-2023-27294 published?

CVE-2023-27294 was published on 2023-02-28 and last updated on 2026-06-17.

CVE-2023-27294

CVE-2023-27294 is a medium-severity vulnerability in Opencats 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: Opencats
Published: 2023-02-28
Last modified: 2026-06-17

Description

Improper neutralization of input during web page generation allows an authenticated attacker with access to a restricted account to submit malicious Javascript as the description for a calendar event, which would then be executed in other users' browsers if they browse to that event. This could result in stealing session tokens from users with higher permission levels or forcing users to make actions without their knowledge.

Frequently asked questions

What is CVE-2023-27294?: Improper neutralization of input during web page generation allows an authenticated attacker with access to a restricted account to submit malicious Javascript as the description for a calendar event, which would then be executed in other users' browsers if they browse to that event. This could result in stealing session tokens from users with higher permission levels or forcing users to make actions without their knowledge.
How severe is CVE-2023-27294?: CVE-2023-27294 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-2023-27294 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-2023-27294?: CVE-2023-27294 affects Opencats. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-27294?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-27294 published?: CVE-2023-27294 was published on 2023-02-28 and last updated on 2026-06-17.

References

https://www.tenable.com/security/research/tra-2023-8

Affected products (1)

cpe:2.3:a:opencats:opencats:0.9.6:*:*:*:*:*:*:*

More vulnerabilities in Opencats

CVE-2022-48011 — Critical (CVSS 9.8): Opencats v0.9.7 was discovered to contain a SQL injection vulnerability via the importID parameter in the Import…
CVE-2022-43019 — Critical (CVSS 9.8): OpenCATS v0.9.6 was discovered to contain a remote code execution (RCE) vulnerability via the getDataGridPager's ajax…
CVE-2021-41560 — Critical (CVSS 9.8): OpenCATS through 0.9.6 allows remote attackers to execute arbitrary code by uploading an executable file via…
CVE-2021-25294 — Critical (CVSS 9.8): OpenCATS through 0.9.5-3 unsafely deserializes index.php?m=activity requests, leading to remote code execution. This…
CVE-2019-13358 — High (CVSS 7.5): lib/DocumentToText.php in OpenCats before 0.9.4-3 has XXE that allows remote users to read files on the underlying…
CVE-2022-43023 — Medium (CVSS 6.5): OpenCATS v0.9.6 was discovered to contain a SQL injection vulnerability via the importID parameter in the Import…

All CVEs affecting Opencats →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →