[UPDATE] [low] Contao: Multiple vulnerabilities enable disclosure of information

lowCVE-2026-55824 CVE-2026-55825

A remote, authenticated attacker can exploit multiple vulnerabilities in Contao to disclose information.

CSIRTS triage

vendor: Contao product: Contao Information disclosure

What: Multiple vulnerabilities in Contao enable authenticated information disclosure.
Who is affected: Contao deployments where authenticated attackers have access are affected.
Urgency: Low severity and requires authentication; not currently exploited.
Action: Update Contao to a patched version addressing CVE-2026-55824 and CVE-2026-55825.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: low
Published: 2026-08-03
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1921

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-558240.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-558250.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-55824	coverage & exploitation status	NVD · CVE.org
CVE-2026-55825	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Contao

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

lowGHSA-grm4-wm43-9jh5: Contao: Possible path traversal in job download URIsghsa · 2026-08-06
lowGHSA-3mr9-p497-58f6: Contao crawler leaks auth credentials to external hostsghsa · 2026-08-06
low[NEW] [low] Contao: Vulnerability allows information disclosurecert-bund · 2026-08-03
lowCVE-2026-55825: Contao is an Open Source CMS. In versions 5.7.0 through 5.7.6, an authenticated backend user w…nvd · 2026-07-31
lowCVE-2026-57232: Contao is an Open Source CMS. From 5.3.35 through 5.3.47 and from 5.7.0-RC1 through 5.7.8, the…nvd · 2026-07-31
lowCVE-2026-55824: Contao is an Open Source CMS. In versions 4.13.40 through 5.3.46 and 5.7.0-RC1 through 5.7.6, …nvd · 2026-07-31