How severe is CVE-2026-27833?

CVE-2026-27833 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-27833 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27833?

CVE-2026-27833 affects Piwigo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27833?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-27833 have an EU (EUVD) identifier?

Yes. CVE-2026-27833 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18870.

When was CVE-2026-27833 published?

CVE-2026-27833 was published on 2026-04-03 and last updated on 2026-06-17.

CVE-2026-27833

CVE-2026-27833 is a high-severity vulnerability in Piwigo with a CVSS 3.x base score of 7.5. 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-862.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18870
Weakness: CWE-862
Affected product: Piwigo
Published: 2026-04-03
Last modified: 2026-06-17

Description

Piwigo is an open source photo gallery application for the web. Prior to version 16.3.0, the pwg.history.search API method in Piwigo is registered without the admin_only option, allowing unauthenticated users to access the full browsing history of all gallery visitors. This issue has been patched in version 16.3.0.

Frequently asked questions

What is CVE-2026-27833?: Piwigo is an open source photo gallery application for the web. Prior to version 16.3.0, the pwg.history.search API method in Piwigo is registered without the admin_only option, allowing unauthenticated users to access the full browsing history of all gallery visitors. This issue has been patched in version 16.3.0.
How severe is CVE-2026-27833?: CVE-2026-27833 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-27833 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27833?: CVE-2026-27833 affects Piwigo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27833?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-27833 have an EU (EUVD) identifier?: Yes. CVE-2026-27833 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18870.
When was CVE-2026-27833 published?: CVE-2026-27833 was published on 2026-04-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:piwigo:piwigo:*:*:*:*:*:*:*:*

More vulnerabilities in Piwigo

CVE-2014-4648 — Critical (CVSS 10.0): Unspecified vulnerability in Piwigo before 2.6.3 has unknown impact and attack vectors, related to a "security failure."
CVE-2026-27634 — Critical (CVSS 9.8): Piwigo is an open source photo gallery application for the web. Prior to version 16.3.0, the four date filter…
CVE-2023-33362 — Critical (CVSS 9.8): Piwigo 13.6.0 is vulnerable to SQL Injection via in the "profile" function.
CVE-2023-33361 — Critical (CVSS 9.8): Piwigo 13.6.0 is vulnerable to SQL Injection via /admin/permalinks.php.
CVE-2020-19213 — Critical (CVSS 9.8): SQL Injection vulnerability in cat_move.php in piwigo v2.9.5, via the selection parameter to move_categories.
CVE-2021-32615 — Critical (CVSS 9.8): Piwigo 11.4.0 allows admin/user_list_backend.php order[0][dir] SQL Injection.

All CVEs affecting Piwigo →

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Browse all CWE-862 (Missing Authorization) vulnerabilities →