Grav Lightbox Gallery 1.1.0 before 1.3.2 File Read via Shortcode Media Actions
Lightbox Gallery plugin 1.1.0 through 1.3.1 on Grav 2.x is exposed. CVSS scores it 7.1 (high), and no vendor rating is given. Fixed in Lightbox Gallery 1.3.2.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 1.3.2
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Lightbox Gallery plugin 1.1.0 through 1.3.1 installed on Grav 2.x Chaining requires the ampersand between the two actions to survive Markdown, e.g. process markdown false or the shortcode wrapped in an HTML block
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 15/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The Grav Lightbox Gallery plugin lets a page editor read server-side YAML files, such as account password hashes, 2FA secrets, and API keys, and expose their contents on a publicly viewable page. The attack is carried out remotely by a logged-in user with low privileges.
Read the original description
Grav Lightbox Gallery plugin 1.1.0 before 1.3.2 on Grav 2.x calls any medium method named in image, thumb or thumb_options shortcode values without core's allowed media action check. A page editor can chain addMetaFile with value, toYaml or toJson to read server-readable YAML files, such as account password hashes, 2FA secrets and API keys, into a publicly viewable page.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Unknown. No tracked technology or package matched
- Severity7.1/10CVSS 7.1
- No patch0/5No signal
What would change the score
- Would score about 65 if added to CISA KEV
- Would score about 60 if CISA's SSVC rates exploitation active
- Would score about 22 if CISA's SSVC rates it automatable
What to do
Check whether your setup matches what the bug needs.
Lightbox Gallery plugin 1.1.0 through 1.3.1 installed on Grav 2.x Chaining requires the ampersand between the two actions to survive Markdown, e.g. process markdown false or the shortcode wrapped in an HTML blockUpgrade to a fixed version: 1.3.2.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- getgrav grav
From 1.1.0 · fixed in 1.3.2
Evidence 2
- Advisory
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-124434
Is CVE-2026-124434 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
A page editor can abuse the Lightbox Gallery shortcode media actions to read server-side YAML files, such as account password hashes, 2FA secrets, plugin API keys and form submissions. The contents are then printed into the page HTML, where anonymous visitors can see them.Source: github.com
Which versions are affected by CVE-2026-124434?
grav: from 1.1.0 before 1.3.2.Source: cve.now feed data
Am I affected, and how do I check?
The advisory lists Lightbox Gallery 1.1.0 through 1.3.1 on Grav 2.x, and the product range is 1.1.0 before 1.3.2. A reader can check the installed Lightbox Gallery plugin version in the Grav admin plugins list, and the Grav version in the admin dashboard. Chaining also needs the ampersand between the two actions to survive Markdown, which happens with process markdown set to false or the shortcode wrapped in an HTML block.Source: github.com
How do I fix CVE-2026-124434?
Upgrade the Lightbox Gallery plugin to 1.3.2, which is the fixed version named in the advisory.Source: github.com